M2A1 (Heavy machine gun) – 45 000
In service: 1933-present
Manroy Engineering (UK)
Produced: 1921-present (M2HB)
Number built: 3 million
58 kg with tripod and T&E
Length: 1,654 mm
Barrel length: 1,143 mm
Cartridge: .50 BMG (12.7×99mm NATO)
Action: Short recoil-operated
Rate of fire:
485-635 rounds/min (M2HB);
750-850 rounds/min (AN/M2);
1,200 rounds/min (AN/M3)
Muzzle velocity: 890 m/s for M33 ball
Effective firing range: 1,800 m
Maximum firing range: 6,800 m
Feed system: Belt-fed (M2 or M9 links)
The XM213/M213 was a modernization and adaptation of existing .50 caliber AN/M2s in inventory for use as a pintle mounted door gun on helicopters using the M59 armament subsystem.
The XM296/M296 is a further development of the AN/M2 machine gun for the OH-58 Kiowa Warrior helicopter.
The GAU-15/A is a lightweight member of the M2/M3 family.The GAU-18/A, is a lightweight variant of the M2/M3, and is used on the USAF's MH-53 Pave Low and HH-60 Pave Hawk helicopters.