The GAU-21 is a .50 caliber, single barrel, rapid-fire machine gun used on the Fleet Air Arm’s MH-60R. The GAU-21 provides both offensive and defensive firepower ranging out to nearly 2000 meters.
An evolution of the FN M3 .50 caliber heavy machine gun, it uses an open-bolt operation and a dual recoil buffer system. Operating independent of either electrical or hydraulic power sources, the GAU-21’s unique soft mount system enhances weapon accuracy and minimizes the firing vibration transmitted to the airframe.
Specifications
| Function | Heavy Machine Gun |
|---|---|
| Manufacturer | Fabrique Nationale Herstal (FN Herstal) |
| Designed | 2004 |
| Operation | Short Recoil |
| Modes | Fully automatic |
| Feed | Belt-fed |
| Rate of fire | 950-1,100 rounds per minute |
| Ammunition | Ball and tracer |
| Calibre | 50 BMG (12.7 x 99mm) NATO |
| Range | 2000m (maximum effective) |
Function
Small arms