GAU-21/A machine gun fitted onto a UH-1Y Venom helicopter.
Source: US Marine Corps (LCpl Jose Gonzalez) - © Public domain
Human operated variant for use on a flexible mount. Intended for use on helicopters, but can also be fitted to vehicles or ships.
Remote operated variant for use in a fixed mount. Operated via solenoid trigger. Used in helicopter gun pods and on vehicles, such as the Avenger anti-aircraft system.
The M3M and M3P are modified versions of the original Browning M2HB heavy machine gun.
The M3P heavy machine gun is used in all four variants of the HMP and RMP gun pods. These gun pods are used on helicopters and light aircraft.
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