The XM133 Minigun is a 6-barreled

Gatling The Gatling gun is a rapid-firing multiple-barrel firearm invented in 1861 by Richard Jordan Gatling. It is an early machine gun and a forerunner of the modern electric motor-driven rotary cannon. The Gatling gun's operation centered on a cy ...

-type

machine-gun A machine gun is a automatic firearm, fully automatic, rifling, rifled action (firearms)#Autoloading operation, autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as Automatic shotgun, a ...

. The weapon is a self-powered, gas-operated variant of the

M134 Minigun The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). It features a Gatling-style rotating barrel assembly with an external power source, normally an electric ...

.United States, 1969. p. B-2. It fired over 3000 rpm but was not put into production. The XM133 is a gas-operated machine-gun. It is nearly identical to the M134 but has barrels with ports that align with the piston drive in the center of the barrel cluster.

References

7.62×51mm NATO machine guns Aircraft guns Machine guns of the United States Multi-barrel machine guns {{machinegun-stub