| XM913 | |
|---|---|
 US 50mm chain gun autocannon | |
| Type | Chain gun autocannon |
| Place of origin | United States |
| Production history | |
| Designer | Picatinny Arsenal |
| Manufacturer | Northrop Grumman |
| Specifications | |
| Mass | 660 lb (300 kg) |
| Length | 157.8 inches (4,010 mm) |
| Barrel length | 117.7 inches (2,990 mm) |
| Shell | 50×228mm |
| Caliber | 50 millimetres (1.97 in) caliber |
| Rate of fire | 100/200 rounds per minute |
The XM913 is an experimental American chain gun produced at Picatinny Arsenal.[1] The cannon is a larger and more modern version of the 35 mm Bushmaster III chain gun, which itself is a larger version of the 25 mm M242 Bushmaster cannon. Although its shells, 50 x 228 mm, are twice the diameter of the 25×137mm cartridge of the M242, the 50mm cannon is not much longer than the smaller weapon.[2] The overall lengths of the 25mm cannon and 50mm cannon are 105.2 inches (267 cm) and 117.7 inches (299 cm), respectively; while the portion of the gun that intrudes into the turret are 30.0 inches (76 cm) and 40.1 inches (102 cm), respectively.
The XM913 has been selected as the primary weapon on the US Army's new Next Generation Combat Vehicle, the XM30 MICV.[3]