The M134 is a minigun of US origin. It was developed by General Electric in 1960 as armament for helicopters and to be used in aircraft gun pods. The name M134 is the US Army designation, the marketing name Minigun has become popular and is even used to refer to rotary barrel weapons in general. The M134 has been trailed as a tripod mounted weapon for infantry use, but contrary to popular belief it cannot be used as a man portable weapon.

The M134 is based on the Gatling principle and uses a six barrel rotary assembly. Ammunition is fed linkless or by belts that travel through a delinking device. The gun is externally powered and has a short spin up time. When operated manually the gun is mounted on a single arm that allows the weapon to swivel horizontally and vertically. The gun is fired using spade grips with a sight unit and tracer ammunition as means of targetting.

The M134 fires the standard 7.62x51mm NATO round at a rate of fire that ranges between 300 and 6.000 rpm. Two rates of fire can be selected and 2.000 and 4.000 rpm are most common. Area targets can be engaged at ranges well over 1 km. The dispersion is about 6 mrad. Normall ammunition cannisters of 1.500, 3.000 or 4.500 rounds are used.

The M134 was widely used as helicopter and aircraft armament during the Vietnam war. Over time the M134 has been widely exported and is now also used on vehicles, small boats and naval vessels.