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.
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