{"title":"Allied Navies Coastal Patrol Boats","description":"","products":[{"product_id":"1-144-royal-navy-12-pdr-12cwt-ha-la-mkix-mount","title":"1\/144 Royal Navy 12-pdr 12cwt HA\/LA MKIX Mount","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 12-pdr 12cwt HA\/LA MKIX Mount as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading mechanism, Non-slip pattern on Footplates, Rivets, Hex nuts, Sighting Apparatus including Cross Hairs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 5º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eFirst used on the \"27-knot\" destroyers of the 1890s. Many small warships still carried these old guns during World War II and they were also used in coastal defense batteries.\u003cbr\u003e\u003cbr\u003eThe Mark I was a fairly complicated design of A tube, B tube, jacket and C hoop shrunk over the B tube\/jacket join. The Mark II was a First World War gun with a combined B tube and jacket while the Mark V was produced during the Second World War and had a monobloc barrel. Some 4,737 Mark I and IIs were built along with an additional 3,494 Mark Vs. Canada also built over 1,000 of these weapons, which were referred to as the \"Ogden 3-inch\" as they were manufactured at the Canadian Pacific Railway's Ogden shops in Calgary.\u003cbr\u003e\u003cbr\u003eThe Japanese guns were originally purchased directly from Elswick and Vickers but later ones were license-built copies. These guns were similar to or virtually identical to the British Mark I. Used as anti-torpedo boat guns on larger warships. Redesignated as 41st Year Type on 25 December 1908. Redesignated in centimeters on 5 October 1917. Although finally classified as 8 cm, the bore remained 3.0\" (7.62 cm).\u003cbr\u003e\u003cbr\u003eEarly Italian guns were purchased from Elswick. Nearly all of the later ones were built by Ansaldo under license to a design provided by Armstrong during World War I or to a modified design for anti-aircraft mountings. After World War I, these guns were used afloat mainly on older warships and auxiliaries. About 730 guns were used for the anti-aircraft defense of Italy during World War II.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31373951172713,"sku":"MM0016P","price":15.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-12pdr-12cwt-HA_LA-MKIX-Mount-4.jpg?v=1574723199"},{"product_id":"1-350-royal-navy-12-pdr-12cwt-ha-la-mkix-mounts-x2","title":"1\/350 Royal Navy 12-pdr 12cwt HA\/LA MKIX Mounts x4","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 12-pdr 12cwt HA\/LA MKIX Mounts x4 as used by the Royal Navy \u0026amp; Commonwealth Navies. Highly detailed guns modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e4x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading mechanism, Non-slip pattern on Footplates, Rivets, Hex nuts, Sighting Apparatus including Cross Hairs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 5º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eFirst used on the \"27-knot\" destroyers of the 1890s. Many small warships still carried these old guns during World War II and they were also used in coastal defense batteries.\u003cbr\u003e\u003cbr\u003eThe Mark I was a fairly complicated design of A tube, B tube, jacket and C hoop shrunk over the B tube\/jacket join. The Mark II was a First World War gun with a combined B tube and jacket while the Mark V was produced during the Second World War and had a monobloc barrel. Some 4,737 Mark I and IIs were built along with an additional 3,494 Mark Vs. Canada also built over 1,000 of these weapons, which were referred to as the \"Ogden 3-inch\" as they were manufactured at the Canadian Pacific Railway's Ogden shops in Calgary.\u003cbr\u003e\u003cbr\u003eThe Japanese guns were originally purchased directly from Elswick and Vickers but later ones were license-built copies. These guns were similar to or virtually identical to the British Mark I. Used as anti-torpedo boat guns on larger warships. Redesignated as 41st Year Type on 25 December 1908. Redesignated in centimeters on 5 October 1917. Although finally classified as 8 cm, the bore remained 3.0\" (7.62 cm).\u003cbr\u003e\u003cbr\u003eEarly Italian guns were purchased from Elswick. Nearly all of the later ones were built by Ansaldo under license to a design provided by Armstrong during World War I or to a modified design for anti-aircraft mountings. After World War I, these guns were used afloat mainly on older warships and auxiliaries. About 730 guns were used for the anti-aircraft defense of Italy during World War II.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374275281001,"sku":"MM0017P","price":10.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/files\/B9-350-12pdr-12cwt-HA-LA-MKIX-Mount-3_Hero-Camera_a.jpg?v=1734630121"},{"product_id":"1-144-royal-navy-hotchkiss-3-pdr-mki-ii-gun","title":"1\/144 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II Guns x2 as used by the Royal Navy and Commonwealth Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374287536233,"sku":"MM0018P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-3-pdr-Hotchkiss-1_Hero-Camera_a.jpg?v=1658974456"},{"product_id":"1-350-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x4","title":"1\/350 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x8 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374316929129,"sku":"MM0019P","price":14.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/files\/PSM-350-3-pdr-Hotchkiss-1_Hero-Camera_a.jpg?v=1752104918"},{"product_id":"1-600-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x8","title":"1\/600 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/600 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x8 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374323318889,"sku":"MM0020P","price":14.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-600-3-pdr-Hotchkiss-Main-3.jpg?v=1574726227"},{"product_id":"1-450-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x4","title":"1\/450 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x4","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/450 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x4 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e4x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374327939177,"sku":"MM0021P","price":14.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/450-3-pdr-Hotchkiss-Main-2.jpg?v=1574726426"},{"product_id":"copy-of-1-700-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x8","title":"1\/700 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/700 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x8 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374337572969,"sku":"MM0022P","price":8.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-700-3-pdr-Hotchkiss-Main-3.jpg?v=1574726586"},{"product_id":"1-96-royal-navy-twin-20mm-oerlikon-mkix-gun","title":"1\/96 Royal Navy Twin 20mm Oerlikon MKIX","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/96 Scale Royal Navy Twin 20mm Oerlikon MKIX as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Gun MKIX available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20 mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374361624681,"sku":"MM0023P","price":20.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-96-20mm-Oerlikon-Twin-MKIX-Main-1.jpg?v=1606683554"},{"product_id":"1-144-royal-navy-twin-20mm-oerlikon-mkix-gun-0º-elevation","title":"1\/144 Royal Navy Twin 20mm Oerlikon MKIX (0º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy Twin 20mm Oerlikon MKIX Guns (0º Elevation) x2 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKIX available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374393409641,"sku":"MM0024P","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-Twin-MKIX-Main-3.jpg?v=1574727659"},{"product_id":"1-144-royal-navy-twin-20mm-oerlikon-mkix-guns-45º-elevation-x2","title":"1\/144 Royal Navy Twin 20mm Oerlikon MKIX (45º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy Twin 20mm Oerlikon MKIX Guns (45º Elevation) x2 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKIX available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374406942825,"sku":"MM0025P","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-Twin-MKIX-45_-Main-3.jpg?v=1574727850"},{"product_id":"1-350-royal-navy-twin-20mm-oerlikon-mkix-guns-0º-elevation-x12","title":"1\/350 Royal Navy Twin 20mm Oerlikon MKIX (0º Elevation) x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy Twin 20mm Oerlikon MKIX (0º Elevation) x8 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKIX available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374436958313,"sku":"MM0026P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-Twin-MKIX-Main-3.jpg?v=1574733587"},{"product_id":"1-350-royal-navy-twin-20mm-oerlikon-mkix-guns-45º-elevation-x12","title":"1\/350 Royal Navy Twin 20mm Oerlikon MKIX (45º Elevation) x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy Twin 20mm Oerlikon MKIX (45º Elevation) x8 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKIX available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374442070121,"sku":"MM0027P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-Twin-MKIX-45_-Main-4.jpg?v=1574733681"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mki-guns-0º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKI \/ MKII Mount (0º Elevation) x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKI \/ MKII Mount (0º Elevation) x2 as used by the Royal and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKI \/ MKII available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374446755945,"sku":"MM0028P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKI-Main-3.jpg?v=1574728894"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mki-guns-45º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKI \/ MKII Mount (45º Elevation) x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKI \/ MKII Mount (45º Elevation) x2 as used by the Royal and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKI \/ MKII available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374459797609,"sku":"MM0029P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKI-45_-Main-3.jpg?v=1574729148"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mki-guns-0º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKI \/ MKII Mount (0º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKI \/ MKII Mount (0º Elevation) x12 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKI \/ MKII available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374503477353,"sku":"MM0030P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-Main-2.jpg?v=1609272303"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mki-guns-45º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKI \/ MKII Mount (45º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKI \/ MKII Mount (45º Elevation) x12 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKI \/ MKII available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374507049065,"sku":"MM0031P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-45_-Main-1_83b42468-d6b2-4369-a762-16afb6ebdaea.jpg?v=1609272369"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mkiia-guns-0º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation) x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation) x2 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKIIA \/ MKIIIA available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374541455465,"sku":"MM0032P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/files\/B9-144-20mm-Oerlikon-MKIIA-0_-1_Hero-Camera_a.jpg?v=1704654942"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mkiia-guns-45º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (45º Elevation) x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (45º Elevation) x2 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKIIA \/ MKIIIA available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breech block is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan style=\"color: brown;\" class=\"tagnamecolor\"\u003e\u003cspan style=\"color: mediumblue;\" class=\"tagcolor\"\u003e\u003c\/span\u003e\u003cspan style=\"color: mediumblue;\" class=\"tagcolor\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca style=\"color: #0094d5; text-decoration: underline;\" title=\"Micro Master about our products\" href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374552334441,"sku":"MM0033P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKIIA-45_-Main-3.jpg?v=1574729987"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mkiia-guns-0º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation) x12 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKIIA \/ MKIIIA  Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374806286441,"sku":"MM0034P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKIIA-Main-2.jpg?v=1609275297"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mkiia-guns-45º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (45º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (45º Elevation) x12 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKIIA \/ MKIIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374824931433,"sku":"MM0035P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKIIA-45_-Main-2.jpg?v=1609275979"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mkviia-guns-0º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKVIIA (0º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKVIIA Guns (0º Elevation) x2 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKVIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374909112425,"sku":"MM0036P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKVIIA-Main-3.jpg?v=1574733823"},{"product_id":"1-144-royal-navy-20mm-oerlikon-mkviia-guns-45º-elevation-x2","title":"1\/144 Royal Navy 20mm Oerlikon MKVIIA (45º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy 20mm Oerlikon MKVIIA Guns (45º Elevation) x2 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKVIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374931492969,"sku":"MM0037P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKVIIA-45_-Main-2.jpg?v=1574733927"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mkviia-guns-0º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKVIIA (0º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKVIIA (0º Elevation) x12 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKVIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374948073577,"sku":"MM0038P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/350-20mm-Oerlikon-MKVIIA-Main-2.jpg?v=1609277619"},{"product_id":"1-350-royal-navy-20mm-oerlikon-mkviia-guns-45º-elevation-x12","title":"1\/350 Royal Navy 20mm Oerlikon MKVIIA (45º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 20mm Oerlikon MKVIIA (45º Elevation) x12 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKVIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374955446377,"sku":"MM0039P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/350-20mm-Oerlikon-MKVIIA-45_-Main-2.jpg?v=1609276826"},{"product_id":"1-144-royal-navy-twin-20mm-oerlikon-mkv-guns-10º-elevation-x2","title":"1\/144 Royal Navy Twin 20mm Oerlikon MKV (10º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy Twin 20mm Oerlikon MKV Guns (10º Elevation) x2 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Seat and Controls\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 10º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31374985855081,"sku":"MM0040P","price":16.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/files\/B9-144-20mm-Twin-Oerlikon-Powered-Mount-10_-1_Hero-Camera_a.jpg?v=1704657792"},{"product_id":"1-144-royal-navy-twin-20mm-oerlikon-mkv-guns-45º-elevation-x2","title":"1\/144 Royal Navy Twin 20mm Oerlikon MKV (45º Elevation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale Royal Navy Twin 20mm Oerlikon MKV Guns (45º Elevation) x2 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31375066792041,"sku":"MM0041P","price":16.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Twin-Oerlikon-Powered-Mount-45_-Main-hero.jpg?v=1574735074"},{"product_id":"1-350-royal-navy-twin-20mm-oerlikon-mkv-guns-10º-elevation-x4","title":"1\/350 Royal Navy Twin 20mm Oerlikon MKV (10º Elevation) x4","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy Twin 20mm Oerlikon MKV (10º Elevation) x4 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e4x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Seat and Controls\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 10º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31375092973673,"sku":"MM0042P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-powered-twin-mountings-Main-2.jpg?v=1574735337"},{"product_id":"1-350-royal-navy-twin-20mm-oerlikon-mkv-guns-45º-elevation-x4","title":"1\/350 Royal Navy Twin 20mm Oerlikon MKV (45º Elevation) x4","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy Twin 20mm Oerlikon MKV (45º Elevation) x4 as used by the Royal Navy and Allied Navies. This is a highly detailed part modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e4x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31375104901225,"sku":"MM0043P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-powered-twin-mountings-45_-Main-4.jpg?v=1574735423"},{"product_id":"1-200-royal-navy-20mm-oerlikon-mkviia-guns-0º-elevation-x2","title":"1\/200 Royal Navy 20mm Oerlikon MKVIIA (0º Elevation) x6","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/200 Scale Royal Navy 20mm Oerlikon MKVIIA (0º Elevation) x6 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKVIIA Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e6x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31376941416553,"sku":"MM0052P","price":15.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-200-20mm-Oerlikon-MKVIIA-1.jpg?v=1629668982"},{"product_id":"1-350-royal-navy-1-350-4-5-8cwt-qf-mki-guns-x2","title":"1\/350 Royal Navy 4.5\" 8cwt QF MKI x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 4.5\" 8cwt QF MKI x2 as used by the Royal Navy and Allied Navies. Highly detailed guns modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech Loading mechanism, Shell Storage, Operators Seat and Controls, Rivets, Hex nuts and Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eComes with 2x bases with sheer for Fore and Aft MTB Decks\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 5º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eThis weapon had an interesting history. It was originally designed to replace the spigot mortar used on Churchill AVRE tanks. However, the Army selected a 6.5\" (16.5 cm) cannon in its place and development of this short-barrel 4.5\" (11.4 cm) gun was halted. Then, in May 1944, the Navy was looking for a more powerful gun than the 6-pdr 7cwt in order to increase the hitting power of the MTBs of the Coastal Forces. Eighteen each of the 4.5\" 8cwt gun and the Army's 95 mm (3.74\") howitzer were ordered and comparison tests were performed at Shoeburyness against targets representing R-boats, sampans, armored barges and merchant ships. In the official report, the Navy concluded that the 4.5\" (11.4 cm) gun was clearly superior and it was selected for further development.\u003cbr\u003e\u003cbr\u003eUnfortunately, the very low muzzle velocity of this gun gave it a rather short range, about half of what was really desired, and shipboard firing trials with it were not very successful. Nonetheless, it was approved, although it did not enter service until long after the end of the war, and was used on MTBs and MGBs for the next fifteen years.\u003cbr\u003e\u003cbr\u003eConstructed of barrel, removable breech ring and vertical sliding breech block with semi-automatic operation. The original naval order was for three prototypes and 106 guns. In September 1945 the Navy agreed to accept all 98 guns that had been finished, even though the requirement at that time was only 60 guns. A total of 36 Mark I mountings were actually completed along with a very few Mark II mountings.\u003cbr\u003e\u003cbr\u003ePostwar, the British tried to develop a stabilized mounting for this weapon, designated as CFS-1 (Coastal Forces System Mark 1). The weight of this mounting grew alarmingly with \"improvements\" and did not see service use.\u003cbr\u003e\u003cbr\u003eActual bore length was 18.88 calibers. All British 4.5\" naval guns have an actual bore diameter of 4.45\" (11.3 cm).\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31384365432937,"sku":"MM0065P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-4_5_-8cwt-QF-MKI-Gun-Main-2.jpg?v=1574820183"},{"product_id":"1-72-royal-navy-3-20cwt-mki-gun-steam-gun-boat","title":"1\/72 Royal Navy 3\" 20cwt MKI (Steam Boat Version)","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/72 Scale Royal Navy 12-pdr 3\"\/45 (76.2 cm) 20cwt (Steam Boat) as used by the Royal Navy and Allied Navies on the Steam Gun Boat type Vessels. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading mechanism, Non-slip pattern on Footplates, Rivets, Hex nuts and Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel is printed separately and can be elevated as desired.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eBritain's first designed-for-the-purpose AAA weapon. Developed under Royal Navy sponsorship just prior to World War I, this gun was widely used by both the Navy and the Army and was employed to protect many British cities during that conflict. First mounted afloat on HMS Iron Duke and subsequently used on most major warships and on some submarines. Replaced in the 1920s by the 4\"\/45 (10.2 cm) Mark V on larger warships.\u003cbr\u003e\u003cbr\u003eDuring World War II this weapon was used on many destroyers in place of a set of torpedo tubes as well as on small warships and submarines.\u003cbr\u003e\u003cbr\u003eThe Mark I consisted of A tube, full length wire, jacket, breech ring, and a vertical sliding breech-block with semi-automatic action. Mark I* had different rifling. Mark IB had loose liner, full-length jacket and a removable breech ring. Mark IC was similar to IB but differed in details of the loose liner. Mark IC* was given to four guns with a muzzle bush instead of a loose liner sealing ring. There was apparently no Mark ID. Mark IE had a monobloc barrel and a screwed and shrunk breech ring. Mark SIE was a Mark IE but with the semi-automatic fittings removed, a balance weight added, a slightly different chamber and some parts were made from stainless steel, probably to allow its use on submarines. Mark II had different breech ring lugs for mounting purposes and no semi-automatic gear. Mark III was an emergency First World War design with parallel screw breech block and a two motion breech mechanism. Mark IV was similar to the Mark III but used a Welin block with an Asbury breech mechanism. Mark IVA was given to two Mark IV guns converted to use a loose liner. All marks fired fixed ammunition.\u003cbr\u003e\u003cbr\u003eThe Navy had a total of 596 Mark I, 198 Mark II, 44 Mark III and 144 Mark IV in service. Of these, 553 Mark I, 186 Mark II, 27 Mark III and 111 Mark IV remained as of September 1939.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31393957445737,"sku":"MM0078P","price":27.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-72-3_-20cwt-SGB-Main-1.jpg?v=1574900281"},{"product_id":"1-200-royal-navy-10ft-dinghy","title":"1\/200 Royal Navy 10ft Dinghy","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/200 Scale Royal Navy 10ft Dinghy. Modelled from plans and photographic reference. Used across a wide range of WW2 Royal \u0026amp; Allied Navy Coastal Patrol Boats.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Boat in set\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eDetails include: Ribs, Floor Boards, Rising, Gunwale, Rubbing Timber, Capping, Keel \u0026amp; Rudder.\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31449882460265,"sku":"MM0149P","price":7.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-10ft-Dinghy-1.jpg?v=1575423390"},{"product_id":"1-350-royal-navy-6-pdr-7cwt-2-244-43-57mm-qf-mark-iia-x2","title":"1\/350 Royal Navy 6-pdr\/7cwt 2.244\"\/43 (57mm) QF Mark IIA x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale Royal Navy 6-pdr\/7cwt 2.244\"\/43 (57mm) QF Mark IIA x2 as used by the Royal Navy and Allied Navies. Highly detailed guns modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: \u003c\/strong\u003e\u003cstrong\u003eAccurate Molins Auto-Breech Loading mechanism, Shell Storage, Operators Seat and Controls, Rivets, Hex nuts and Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eComes with 2x bases with sheer for Fore and Aft MTB Decks\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 5º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eThe Mark IIA was a modification of the army’s Mark II anti-tank gun fitted with Molins auto-loading gear. Used by many MTBs in power operated mountings to give them a bigger “punch” when attacking barges and small vessels. It was also proposed to use the Mark II without the auto-loading gear as a wet mount for submarines but this never made it out of the prototype stage.\u003cbr\u003e\u003cbr\u003eThe Molins auto-loading gear carried seven rounds, one in the breech and six in the feed system. An additional twelve rounds were carried in ready racks on the naval mounting. The last round could not be fired, a precautionary measure to prevent the feed from running out of ammunition which would have necessitated manually working the breech mechanism.\u003cbr\u003e\u003cbr\u003eUnlike the RAF version, this weapon allowed only semi-automatic firing.\u003cbr\u003e\u003cbr\u003eThese guns were of monobloc construction and actual bore length was 42.87 calibers. About 600 guns were produced with Molins gear.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31450201948265,"sku":"MM0150P","price":10.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-6pdr-_57mm__7cwt-QF-MKIIA-Main-1.jpg?v=1575427219"},{"product_id":"1-200-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x4","title":"1\/200 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x4","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/200 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x4 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31453127999593,"sku":"MM0154P","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-200-3-pdr-Hotchkiss-2.jpg?v=1575446575"},{"product_id":"1-192-royal-navy-hotchkiss-3-pdr-mki-ii-guns-x4","title":"1\/192 Royal Navy Hotchkiss 3-pdr MKI \u0026 II x4","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/192 Scale Royal Navy Hotchkiss 3-pdr MKI \u0026amp; II x4 as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading and Trigger mechanism, Operators Rest, Rivets, Hex nuts, Sighting Apparatus\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 0º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHotchkiss 3-pdr guns were introduced in 1886 for locations where the 6-pdr gun was considered to be too heavy. Used as anti-torpedo boat guns on most small cruisers built prior to World War I. As did other nations, the British found that these small-caliber projectiles were too light to be effective and many guns were converted following World War I to sub-caliber training and saluting guns. This last use meant that a number of these guns survived until World War II when they were converted back to shooting guns and used on MLs and other minor auxiliary warships. An approximate total of 2,950 of these guns were in naval service, with about 1,950 of these still available in 1939.\u003cbr\u003e\u003cbr\u003eMark I was of monobloc construction while the Mark II was a built-up design. Almost all surviving guns in 1939 were Mark I.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31453205233769,"sku":"MM0155P","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-200-3-pdr-Hotchkiss-2_b6c8641e-ff5b-4900-b94c-4143d295de1b.jpg?v=1575446615"},{"product_id":"1-192-royal-navy-10ft-dinghy","title":"1\/192 Royal Navy 10ft Dinghy","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/192 Scale Royal Navy 10ft Dinghy. Modelled from plans and photographic reference. Used across a wide range of WW2 Royal \u0026amp; Allied Navy Coastal Patrol Boats.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Boat in set\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eDetails include: Ribs, Floor Boards, Rising, Gunwale, Rubbing Timber, Capping, Keel \u0026amp; Rudder.\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31471050391657,"sku":"MM0168P","price":7.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-10ft-Dinghy-1_1cf0e863-8cf4-4df3-91fd-9ea99f364334.jpg?v=1575585350"},{"product_id":"1-700-royal-navy-twin-20mm-oerlikon-mkv-guns-25º-elevation-x8","title":"1\/700 Royal Navy Twin 20mm Oerlikon MKV (25º Elevation) x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/700 Scale Royal Navy Twin 20mm Oerlikon MKV (25º Elevation) x8 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights and Operators Seat and Controls\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 25º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31646081941609,"sku":"MM0196P","price":10.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/1_700-20mm-Oerlikon-Twin-MKV-Main-2.jpg?v=1576460975"},{"product_id":"1-720-royal-navy-twin-20mm-oerlikon-mkv-guns-25º-elevation-x8","title":"1\/720 Royal Navy Twin 20mm Oerlikon MKV (25º Elevation) x8","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/720 Scale Royal Navy Twin 20mm Oerlikon MKV (25º Elevation) x8 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed Twin 20mm Oerlikon Guns MKV available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e8x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights and Operators Seat and Controls\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 25º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31646088069225,"sku":"MM0197P","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/1_700-20mm-Oerlikon-Twin-MKV-Main-2_3a77eab0-e2b6-40cf-9abc-2e8ddeaf7aba.jpg?v=1576461007"},{"product_id":"1-144-us-navy-20mm-oerlikon-mki-guns-0º-elevation-x2","title":"1\/144 US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º Elevation, Notch Variation) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º Elevation, Notch Variation) x2. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThese have a Shield Notch Variation as seen on US DD's \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31769861619817,"sku":"MM0268P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKI-US-Notches-Main-1.jpg?v=1587255613"},{"product_id":"1-144-us-navy-20mm-oerlikon-mki-guns-45º-elevation-x2","title":"1\/144 US Navy 20mm Oerlikon MK 2 \/ MK 4 (45º Elevation) x2","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (45º Elevation) x2. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31769867550825,"sku":"MM0269P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKI-45_-Main-3_bce36237-43f1-4991-9ac0-a072577191f6.jpg?v=1578887151"},{"product_id":"1-350-us-navy-20mm-oerlikon-mki-guns-0º-elevation-x12","title":"1\/350 US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º Elevation) x12. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 0º elevation and in Non-depressed position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31769874366569,"sku":"MM0270P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-Main-2_d788c33c-7e9d-4430-ba36-26737325c5c0.jpg?v=1609271054"},{"product_id":"1-350-us-navy-20mm-oerlikon-mki-guns-45º-elevation-x12","title":"1\/350 US Navy 20mm Oerlikon MK 2 \/ MK 4 (45º Elevation) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (45º Elevation) x12. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels set at 45º elevation and in Depressed\/Firing position.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31769891111017,"sku":"MM0271P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-45_-Main-1.jpg?v=1609272239"},{"product_id":"1-48-royal-navy-20mm-oerlikon-mkiia-gun-0º-elevation","title":"1\/48 Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation)","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/48 Scale Royal Navy 20mm Oerlikon MKIIA \/ MKIIIA (0º Elevation) x1 as used by the Royal Navy and Commonwealth Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKIIA \/ MKIIIA available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel printed separately in Non-depressed position, elevation set at 0º.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31854601928809,"sku":"MM0296P","price":27.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-48-20mm-Oerlikon-MKIIA-0_-1_Hero-Camera_a.jpg?v=1657216601"},{"product_id":"1-48-20mm-oerlikon-gun","title":"1\/48 20mm Oerlikon x2 (Non-depressed)","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/48 Scale 20mm Oerlikon x2 as used by the Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Guns only in non-depressed position\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31857404575849,"sku":"MM0303P","price":22.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-48-Oerlikon-Non-Depressed-x2-1_Hero-Camera_a.jpg?v=1655412620"},{"product_id":"1-72-royal-navy-20mm-oerlikon-mki-gun-0º-elevation","title":"1\/72 Royal Navy 20mm Oerlikon MKI (0º Elevation)","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/72 Scale Royal Navy 20mm Oerlikon MKI (0º Elevation) x1 as used by the Royal Navy and Allied Navies. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MKI Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels are printed separately for ease of painting.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan style=\"color: brown;\" class=\"tagnamecolor\"\u003e\u003cspan style=\"color: mediumblue;\" class=\"tagcolor\"\u003e\u003c\/span\u003e\u003cspan style=\"color: mediumblue;\" class=\"tagcolor\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca style=\"color: #0094d5; text-decoration: underline;\" title=\"Micro Master about our products\" href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31884558794857,"sku":"MM0316P","price":19.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-72-20mm-Oerlikon-MKI-Main-1.jpg?v=1581380855"},{"product_id":"1-72-us-navy-20mm-oerlikon-mki-gun-0º-elevation","title":"1\/72 US Navy 20mm Oerlikon Mount MK 4 (0º Elevation)","description":"\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/72 Scale US Navy 20mm Oerlikon Mount MK 4 (0º Elevation) x1 as used by the US Navy in WW2 and post WW2. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon Mount MK 4 Guns available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including accurate Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels are printed separately for ease of painting.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e \u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31884610666601,"sku":"MM0317P","price":19.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-72-20mm-Oerlikon-MKI-Main-1_77d11d6e-6ad1-4a6f-9079-7b5569cbebe3.jpg?v=1581381499"},{"product_id":"1-350-us-navy-20mm-oerlikon-mki-guns-square-shield-not-in-use-x12","title":"1\/350 US Navy 20mm Oerlikon MK 2 \/ MK 4 (Not in Use, Square Shield) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (Not-in-use, Square Shield) x12. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts (these Mounts carry the Squared off Shield without the Notches)\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels elevated to Maximum (Not-in-use) and in Non-depressed.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31892932657257,"sku":"MM0321P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-NIU-SS-Main-2.jpg?v=1609360860"},{"product_id":"1-144-navy-20mm-oerlikon-mki-guns-square-shield-not-in-use-x2","title":"1\/144 US Navy 20mm Oerlikon MK 2 \/ MK 4 (Not in Use, Square Shield) x2","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/144 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (Not-in-use, Square Shield) x2. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e2x Mounts (these Mounts carry the Squared off Shield without the Notches)\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels elevated to Maximum (Not-in-use) and in Non-depressed.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31893198471273,"sku":"MM0322P","price":11.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-144-20mm-Oerlikon-MKI-90_-NIU-Main-2.jpg?v=1581473228"},{"product_id":"1-350-us-navy-20mm-oerlikon-mki-guns-0º-elevation-square-shield-x12","title":"1\/350 US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º elevation, Square Shield) x12","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/350 Scale US Navy 20mm Oerlikon MK 2 \/ MK 4 (0º elevation, Square Shield) x12. These are highly detailed parts modelled using the John Lambert plans and reference photographs to create the most accurate and detailed 20mm Oerlikon MK 2 \/ MK 4 available anywhere.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e12x Mounts (these Mounts carry the Squared off Shield without the Notches)\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate parts, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eHex nuts, accurate Rivet placement, 60 Round Ammo Cartridge, Sights (including Cross-Hairs) and Operators Rests\u003c\/strong\u003e \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrels elevated at 0º elevation and Non-depressed.\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eWidely used by many nations, this 20mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II.\u003cbr\u003e\u003cbr\u003eIn 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks. They rejected the Oerlikon Model 1934, but in 1938 the Admiralty informed Oerlikon that if they could raise the muzzle velocity and demonstrate that the weapon could be used and maintained by non-specialist personnel, such as fishermen and merchant seamen, then it would be acceptable. Oerlikon made the necessary changes and the first prototypes of the new design were delivered late in 1939. These were immediately accepted into service as the 20 mm Mark I and Britain placed large orders with Oerlikon and obtained a manufacturing license. However, only a few additional guns were delivered prior to the German occupation of France, which cut off the supply route. This is basically why so few British ships had Oerlikon guns during the early part of the war, with the official USN BuOrd history stating that the Royal Navy had only 100 Oerlikons at sea in November 1940.\u003cbr\u003e\u003cbr\u003eShortly before France fell, the British took advantage of their manufacturing license with Oerlikon to obtain a set of production drawings. These were brought back from Switzerland by Stewart Mitchell, who had previously been Inspector of Naval Ordnance Contracts at the Oerlikon factory in Zurich. Mitchell, together with the famous ordnance expert Charles Goodeve and with Cmdr. S.W. Roskill (then working in the Admiralty Staff Division and later the famous Capt. Roskill, author of \"The War at Sea\") set up a factory at Ruislip to produce Oerlikon guns. \"Considerable difficulties\" with equipment and labor had to be overcome before deliveries of the British version of this gun, designated as the 20 mm Mark II, began in the fall of 1941. In November 1941, the battleship HMS Duke of York was commissioned with six of these weapons, which I believe to have been the first warship to carry British-produced Oerlikon guns \"as completed.”\u003cbr\u003e\u003cbr\u003eIt is not specifically known how many guns were built by Britain and the Dominion nations, but the Mounting Appropriation Lists of September 1945 show about 55,000 guns in service in the British and Commonwealth navies. This total probably includes weapons built in the USA that were provided as a part of Lend-Lease or installed on those ships refitted in US shipyards. Some British Auxiliary ships still carried these weapons as late as 2006.\u003cbr\u003e\u003cbr\u003eThe Mark 1 was the original design by Oerlikon. A small number of this version were built in the USA as prototypes. The USA Mark 2 and the British Mark II were the first production versions manufactured in those countries. The differences from the Mark 1 were mainly in the arrangements of the buffer springs, although the USA Mark 2 also had cooling ribs and two locking slots. The USA Mark 3 was similar to the Mark 2 but had fewer cooling ribs and only one locking slot. The later USA Mark 4 was the most common version built in the USA and had a single, heavier buffer spring. This version was built to slightly different tolerances as it was redesigned using English measurement units rather than the metric units used on previous Marks. The Mark 4 Mod 4 had a fluted chamber which allowed easier ejection of the spent cartridge cases. The Mark 1 could be fired in single-shot mode, while all of the others could only be fired in automatic mode. All guns used a monobloc barrel and a horizontal sliding breech block mechanism.\u003cbr\u003e\u003cbr\u003eThese guns are open-breech, air-cooled and use a gas blow-back recoil system. This weapon has some unusual features not found in other automatic guns. When fired, the case pushes the breech back against the force of the barrel springs. The barrel does not recoil, the breechblock is never locked against the breech and is actually moving forward when the gun fires. This weapon lacks a counter-recoil brake, as the force of the counter-recoil is checked by the explosion of the next round of ammunition.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e*STOCKED ITEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31911340179561,"sku":"MM0324P","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-350-20mm-Oerlikon-MKI-0_-SS-Main-2.jpg?v=1609359217"},{"product_id":"1-240-royal-navy-12-pdr-12cwt-ha-la-mkix-mount","title":"1\/240 Royal Navy 12-pdr 12cwt HA\/LA MKIX Mount","description":"\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003ePRODUCT DESCRIPTION\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 14px;\"\u003e1\/240 Scale Royal Navy 12-pdr 12cwt HA\/LA MKIX Mount as used by the Royal Navy and Allied Navies. Highly detailed gun modelled from plans and many reference photographs.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003e1x Mount\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eHighly detailed and accurate part, modelled from the John Lambert plans and photographic reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetails include: Training and Elevation Gear, \u003c\/strong\u003e\u003cstrong\u003eAccurate Breech loading mechanism, Non-slip pattern on Footplates, Rivets, Hex nuts, Sighting Apparatus including Cross Hairs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBarrel set at 5º elevation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eHISTORICAL DATA\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003eFirst used on the \"27-knot\" destroyers of the 1890s. Many small warships still carried these old guns during World War II and they were also used in coastal defense batteries.\u003cbr\u003e\u003cbr\u003eThe Mark I was a fairly complicated design of A tube, B tube, jacket and C hoop shrunk over the B tube\/jacket join. The Mark II was a First World War gun with a combined B tube and jacket while the Mark V was produced during the Second World War and had a monobloc barrel. Some 4,737 Mark I and IIs were built along with an additional 3,494 Mark Vs. Canada also built over 1,000 of these weapons, which were referred to as the \"Ogden 3-inch\" as they were manufactured at the Canadian Pacific Railway's Ogden shops in Calgary.\u003cbr\u003e\u003cbr\u003eThe Japanese guns were originally purchased directly from Elswick and Vickers but later ones were license-built copies. These guns were similar to or virtually identical to the British Mark I. Used as anti-torpedo boat guns on larger warships. Redesignated as 41st Year Type on 25 December 1908. Redesignated in centimeters on 5 October 1917. Although finally classified as 8 cm, the bore remained 3.0\" (7.62 cm).\u003cbr\u003e\u003cbr\u003eEarly Italian guns were purchased from Elswick. Nearly all of the later ones were built by Ansaldo under license to a design provided by Armstrong during World War I or to a modified design for anti-aircraft mountings. After World War I, these guns were used afloat mainly on older warships and auxiliaries. About 730 guns were used for the anti-aircraft defense of Italy during World War II.\u003c\/span\u003e\u003cspan class=\"tagnamecolor\" style=\"color: brown;\"\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003cspan class=\"tagcolor\" style=\"color: mediumblue;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e  \u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003e\u003cspan style=\"caret-color: #000000; color: #000000; font-family: DIN Next; font-style: normal; font-variant-caps: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -moz-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;\"\u003e\u003cspan style=\"text-decoration: underline; color: #0094d5;\"\u003e\u003ca href=\"http:\/\/micromaster.co.nz\/pages\/about-our-products\" title=\"Micro Master about our products\" style=\"color: #0094d5; text-decoration: underline;\"\u003eSUPPORT REMOVAL, CLEANING \u0026amp; PAINTING GUIDE\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"sectioncont collapsiblearea\"\u003e \u003c\/p\u003e","brand":"Micro Master","offers":[{"title":"Default Title","offer_id":31989641642089,"sku":"MM0329P","price":12.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/products\/B9-240-12pdr-Main-2.jpg?v=1582058977"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3579\/6585\/collections\/Allied-Patrol-Boats.jpg?v=1575425001","url":"https:\/\/micromaster.co.nz\/collections\/royal-navy-coastal-patrol-boats.oembed?page=8","provider":"Micro Master 3D Printed Hobby Parts","version":"1.0","type":"link"}