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Cartridge, 20 mm, high explosive incendiary, Mk 106 Mod 0 & 1 (USN) 60,000: 1700 ±50: Impact detonating: 3350: Unpainted fuze, red and yellow projectile Cartridge, 20 mm, armor-piercing incendiary, Mk 107 Mod 0 (USN) 60,000: 1700 ±50: Armor-piercing incendiary: 3350: No fuze, nose of projectile blue or brown with red band.
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 basic design was based on the original Oerlikon 20 mm cannon, in turn based on the German Empire's Becker 20 mm cannon of World War I. In the post-war period, Oerlikon had developed the original design to produce three autocannons with increasingly powerful rounds; the original model, later known as the "F", used the Becker 20x70mm round ...
The Hispano fired a 130 grams (4.586 oz) 20 mm diameter projectile from a 110 mm (4.331 in) long casing, the whole round weighing 257 g (9.065 oz). [19] Lengths of the projectiles varied with type but were set to variable depth in the casing to produce a total full round length of 184 mm (7.244 in) regardless of projectile type. [ 20 ]
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]
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The stolen bullets — 162,000 rounds of 5.56 ammunition for assault-style rifles like an AR-15 — were going to be used for training purposes, Columbus police said.
Also, its length and weight made portability difficult, so a two-wheeled split-trail carriage was provided. Once towed into position the gun could be fired from the carriage or dismounted and fired from a bipod for the anti-tank role. In the anti-tank role, it was able to penetrate 15–18 mm (0.59–0.71 in) at 300 m (330 yd) (30°). [2]