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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.
Caliber (mm) Power source Weapon name Country of origin Period 20: Internal: 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 ...
On the front side the bottom arc of the ribbing running along the bottom edge was embossed: "AMMO BOX CAL .50 M2". The back side was usually where the content information was stenciled because there was more empty space. It held 110 belted or 105 linked rounds of .50-caliber ammo. (Dimensions: 12 ¼" Length × 6 ¼" Width × 7 ½" Height ...
The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used. [2] [3]
The M2 machine gun or Browning .50 caliber machine gun (informally, "Ma Deuce") [14] [15] is a heavy machine gun that was designed near the end of World War I by John Browning. While similar to Browning's M1919 Browning machine gun , which was chambered for the .30-06 cartridge, the M2 uses Browning's larger and more powerful .50 BMG (12.7 mm ...
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 ]
The M39 cannon with its 20 mm ammunition chute. The M39 cannon is a 20 mm caliber single-barreled revolver cannon developed for the United States Air Force in the late 1940s. It was used on a number of fighter aircraft from the early 1950s through the 1980s.
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]