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20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called " guns ", from larger-caliber " cannons " (e.g. machine gun vs. autocannon ), is conventionally taken to be the 20 mm round, the smallest caliber of autocannon.
The round includes a high explosive and incendiary component and can also defeat light armor (hence its multi-purpose designation). [1] The self-destruct feature engages at approximately 2,300 metres (7,500 ft) [2] and destroys the round, preventing it from falling back to earth and inflicting damage to the surrounding territory. The price per ...
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
Sweden; 56 Flak 30 bought in 1939, designated 20 mm lvakan m/39 in Swedish service. Netherlands: 30 Flak 30 guns were bought and sent over for the Dutch East Indies army in 1938. Portugal: unknown number of Flak 30/38 guns (named Metralhadora Pesada AA 20mm m/943) bought in 1943 and used by the Portuguese Army during the Portuguese Colonial War.
3-round detachable box magazine The Anzio 20mm rifle [ 1 ] is an American anti-materiel rifle designed and marketed by Anzio Iron Works. It is the first American anti-materiel rifle designed and mass-produced for public sale with a bore diameter in excess of .50 caliber in over 80 years. [ 2 ]
Penetration 20mm at 25-degree impact and 100 meter range, [3] 6.3mm RHA at 0-degree impact and 1000-m range. [4] M56: HEI: 102 9 g HE (RDX/wax/Al) and 1.5 g incendiary 1030: Nose fuzed round, no tracer. Effective radius for causing casualties to exposed personnel is 2 meters with fragmentation hazard out to 20 meters.
It is a suitable round for engaging helicopters, aircraft and lightly armored vehicles, as well as unarmored vehicles, and it is capable of igniting jet fuel. The Mk 211 has about the same destructive power as a standard 20mm round against such targets and can penetrate 11 mm of RHA at 45° from a range of 1000 meters. [5]
The basis of the system is the 20 mm M61 Vulcan rotary cannon, used by the United States military on various tactical aircraft since 1959, linked to a K u band fire control radar system for acquiring and tracking targets. This proven system was combined with a purpose-made mounting, capable of fast elevation and traverse speeds, to track ...
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