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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). [2] It features a Gatling-style rotating barrel assembly with an external power source, normally an electric motor.
Later editions of Jane's Infantry Weapons claimed a theoretical cyclic rate of up to 6,000 rpm. George Chinn, author of The Machine Gun Volume V, contended that the XM214 prototype had a rate of fire of up to 10,000 rpm, but the man-portable Six-Pak was limited to 4,000 rpm. General Electric tested it successfully at 12,000 rpm. [3]
The GAU-19/A is designed to accept standard NATO .50 caliber M9-linked ammunition. The rate of fire is selectable to be either 1,000 or 2,000 rounds per minute. The Humvee armament kit version fires at 1,300 rounds per minute. The average recoil force when firing is 382 lb/ft, 495 lb/ft or 629 lb/ft depending on firing rate.
In April 2017, Raytheon tested a new electric gun for the Phalanx allowing the system to fire at varying rates to conserve ammunition. The new design replaces the pneumatic motor, compressor, and storage tanks, reducing system weight by 180 lb (82 kg) while increasing reliability and reducing operating costs.
In order to develop a weapon with a more reliable, higher rate of fire, General Electric designers scaled down the rotating-barrel 20 mm M61 Vulcan rotary cannon for the 7.62×51mm NATO ammunition. The resulting weapon, the M134 Minigun, could fire up to 6,000 rounds per minute without overheating. The gun has a selectably variable rate of fire ...
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This rate was later changed to a fixed rate of 3,900 rpm. [3] At this speed it would take 18 seconds of sustained fire to empty the magazine. In practice, the cannon is limited to one and two-second bursts to avoid overheating and conserve ammunition; barrel life is also a factor, since the USAF has specified a minimum life of at least 20,000 ...
"These fires caused an annual average of 3 civilian fire deaths, 30 civilian fire injuries and $14 million in direct property damage" the NFPA said in a statement.