Mk44 Bushmaster II
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The Mk44 Bushmaster II is a 30 mm chain gun manufactured by Northrop Grumman. It is a derivative of the 25 mm M242 Bushmaster, and uses 70% of the same parts as the M242 while increasing the firepower by as much as 50% with the 20% increase in... Wikipedia
Barrel length: 94.88 inches (2,410 mm)
Caliber: 30 millimetres (1.18 in) caliber; 40 millimetres (1.57 in) caliber
Effective firing range: 3,000 metres (9,800 ft) land appl. 5,100 metres (16,700 ft) naval appl
In service: 2007–present
Manufacturer: Northrop Grumman
Mass: 344 lb (160 kg)
Muzzle velocity: 1,080 metres per second (3,500 ft/s) (HEI-T ammunition)