XM133 Minigun

The XM133 Minigun is a 6-barreled Gatling-type machine-gun. The weapon is a self-powered, gas-operated variant of the M134 Minigun.[1] It fired over 3000 rpm but was not put into production.

Machine Gun, 7.62mm, M133
TypeGatling-type machine gun
Place of originUnited States
Production history
DesignerGeneral Electric
ManufacturerGeneral Electric, Garwood Industries , Dillon Aero, DeGroat Tactical Armaments, McNally Industries LLC
Cartridge7.62×51mm NATO
Caliber7.62 mm (0.308 in)

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.


  1. United States, 1969. p. B-2.
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