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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.
Becker Type M2 20 mm cannon German Empire: World War I 20: Internal: Nkm wz.38 FK Poland: Interwar 20: Internal: Polsten Poland: World War II 20: Internal: Berezin B-20 Soviet Union: World War II 20: Internal: ShVAK cannon Soviet Union: World War II 20: Internal: Ho-1 cannon Empire of Japan: World War II 20: Internal: Ho-3 cannon Empire of ...
The round includes a red tracer to aid in targeting. 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 ...
The same design inspired the 30mm British ADEN cannon and the French DEFA, but American designers chose a smaller 20 mm round to increase the weapon's rate of fire and muzzle velocity at the expense of hitting power. The 20×102mm round was later chosen by France for the M621 cannon. [1]
The HS.820 is a 20 mm caliber autocannon developed by Hispano-Suiza primarily for aircraft use, but more widely used in a series of ground-based anti-aircraft guns. After Oerlikon purchased Hispano's armaments division in 1970, the HS.820 became the Oerlikon KAD, supplanting Oerlikon's own KAA and KAB weapons in the process. [1]
The 20 mm AA Machine Cannon M/38 was a 20 mm rapid fire autocannon produced by the Danish company Dansk Industri Syndikat (DISA). The gun, which could be adapted to several tactical uses, was a primary weapon of the military of Denmark. It was also exported to numerous countries around the world because of its versatility.
The original Flak 30 design was developed from the Solothurn ST-5 as a project for the Kriegsmarine, which produced the 20 mm C/30. The gun fired the "Long Solothurn", a 20 × 138 mm belted cartridge that had been developed for the ST-5 and was one of the more powerful 20 mm rounds. [2]
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]