M242
US M242
Technical Summary
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Caliber: 25 mm NATO
Firearm action: Chain gun
Manufactured by: ATK
Barrel Length: 85.6 in (2.175 m)
Effective Range: 1.2 miles (2 km)
Maximum Range: 4.23 miles (6,800 m)
Maximum ROF: 200 Rounds/Minute
Muzzle velocity: 3,609 ft/s (1,100 m/s)
Total Weight: 242.5 lb (110 kg)

The M242 Bushmaster is a 25 mm chain gun. It is currently used by the US Armed Forces and other NATO forces. It is used extensively on vehicles and aircraft.

It is an externally powered, chain driven, single-barrel weapon which may be fired in semi-automatic or automatic modes. It is fed by a metallic link belt and has dual-feed capability. The term "chain gun" derives from the use of a roller chain that drives the bolt back and forth.

It can destroy lightly armored vehicles, aerial targets (such as helicopters and slow-flying aircraft). It can also suppress enemy positions such as troops in the open, dug-in positions, and built-up areas. The standard rate of fire is 200 rounds per minute, and has a range of 2,000 meters (depending on the type of ammunition used).