M134 Minigun

The M134 Minigun is a U.S.-designed, electrically driven six-barrel rotary machine gun chambered for 7.62×51mm NATO ammunition. Its rotating barrel assembly enables a high rate of fire.

Gatling gun: A family of manually or mechanically powered firearms that use multiple rotating barrels to fire repeatedly. The M134 adapts the rotating-barrel principle associated with this earlier weapon family.
General Electric: An American industrial company that developed electrical and defense technologies. General Electric designed and produced the M134.
UH-1 Iroquois: A U.S. utility helicopter widely used during the Vietnam War. UH-1 gunships carried M134s as suppressive weapons.
M240 machine gun: A belt-fed, gas-operated general-purpose machine gun chambered for 7.62×51mm NATO. Unlike the M134, the M240 uses a single barrel and its firing cycle is gas-operated.
Rotary cannon: A class of firearms that use rotating barrels to cycle ammunition and sustain rapid fire. The M134 belongs to the broader rotary-firearm design family.
M61 Vulcan: A six-barrel, electrically driven 20 mm rotary cannon developed for aircraft. The M134 adapted the M61's rotary mechanism to rifle-caliber ammunition.
AH-1 Cobra: A U.S. attack helicopter first fielded during the Vietnam War. Early Cobra configurations used the M134 in a nose-mounted weapon system.
M2 Browning: A recoil-operated .50-caliber heavy machine gun designed by John Browning. The M2 uses one barrel and a much larger cartridge rather than rotary-barrel operation.
Electric motor: A machine that converts electrical energy into mechanical motion. An electric motor drives the M134's barrel cluster and firing cycle.
XM134: The experimental designation associated with the development of the 7.62 mm Minigun. The M134 designation followed prototype and test development under this name.

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Richard Jordan GatlingBroader topic: It revived the Gatling-style rotating-barrel arrangement with electric power.