The M61 Vulcan is a hydraulically or pneumatically driven, six-barrel, air-cooled, electrically fired Gatling-style rotary cannon which fires 20 mm rounds at an extremely high rate (typically rounds per minute). The M61 and its derivatives have been the principal cannon armament of Multi-barrel machine guns · Rotary cannons · United States Marine Corps.
The Type 2 20 mm AA machine cannon was a Japanese-designed anti-aircraft gun, based on the German Flak 38. It entered service in A central.
An autocannon or automatic cannon is a large, fully automatic, rapid-fire projectile weapon that fires armour-piercing or explosive shells, as opposed to the bullet fired by a machine gun. Autocannons often have a larger calibre than a machine gun (e.g., 20 mm or List of autocannon · · Automatic grenade launcher. The MiG Leader, Capt. Retrieved from " gundemonline.org? In contrast, all Eastern Bloc aircraft kept their guns. While a lot of machine gun rounds and a fair amount of luck were needed to cause critical damage, a single cannon shell could instantly sever essential structural elements, penetrate armour or open up a fuel tank beyond the capacity of self-sealing compounds, even from fairly Machine Cannon range. CSI - Technical Help. TOO SMALL: The TNT Machine Gun! [Auto TNT Cannon!]