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 …

The established, proven and reliable M50 series ammunition is compatible with all 20mm M61, M197, M39 and M621 gun systems worldwide.

These are electrically primed cartridges with high-explosive-incendiary projectiles and centrifugally armed, point-detonating fuzes. They are used in the M39, M61, M168, and M195 automatic cannons. The cartridge case is unpainted but has nomenclature and …

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The 20mm Mk244 MOD O APDS Enhanced Lethality Cartridge (ELC) with Compacted Ball Powder ® Propellant gives the MK15 Block 1B system full effectiveness against fast attack boats, anti-ship missiles, helicopters, small water craft and low flying planes.

INERT 20mm M56A2 High Explosive Round. 20x102 Vulcan. Approx length 7", Approx width 1", Approx weight .6lbs. Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition.

The document summarizes specifications for General Dynamics' M50 series 20mm ammunition, including the M53 API, M56 HEI, and M55 TP variants. It describes the ammunition as compatible with various 20mm gun systems and established over 30 years of production.

Nov 10, 1998 · Twenty-millimeter ammunition is the ammo used on the M197 automatic gun. The rounds are electrically primed; chamber pressure varies from 60,500 to 61,500 psi. Projectile weight of the M56 HEI round is 1,543 grains (3.5 ounces); other 20-mm projectiles are of comparable weight.

Nammo's 20mm series mainly consists of aircraft ammunition as well as anti-aircraft ammunition. Our proven and versatile technology includes MP (multipurpose), TP and HE (high explosive variants. Nammo's 20mm ammunition is qualified for a wide range of cannons.

Type: HEI, M56A3: Projectile: steel, steel fuze, yellow with red band, 1 copper driving band Projectile Markings: (black ink) 20MM HEI M56A3 OL-84L0045005 RNO84E010-007 M56A4: Case: brass, choke crimp Markings: (black ink) 20MM M103 ACN84J004-910: Primer: electric, flat, brass, ring crimp