The General Electric M134 Minigun is an American external power Gatling-type action automaticmachine-gun designed for use in aircraft and helicopters during the Vietnam War. The General Electric M134 Minigun is chambered for the 7.62 mm x 51 cartridge which it takes from a beltfeed and fires with a cyclic rate of between 300 and 6000 rounds per minute with a muzzle velocity of 869 meters per second. The General Electric M134 Minigun has six barrels, rotated by a 28-volt electric motor and various sights depending upon its application. Research Minigun