Mk44 Bushmaster II

Mk44 Bushmaster II
Finnish CV 9030 with Mk44
TypeChain gun autocannon
Service history
In service2007–present
Used bySee users
Production history
DesignerAlliant Techsystems
ManufacturerNorthrop Grumman
Specifications
Mass344 lb (160 kg)
Length134.05 inches (3,405 mm)
Barrel length94.88 inches (2,410 mm)
Width13.5 inches (340 mm)
Height15.43 inches (392 mm)

Shell30×173mm
40×180mm
Caliber30 millimetres (1.18 in) caliber
40 millimetres (1.57 in) caliber
Rate of fire100/200 rounds per minute
Muzzle velocity1,080 metres per second (3,500 ft/s) (HEI-T ammunition)
Effective firing range3,000 metres (9,800 ft) land appl.
5,100 metres (16,700 ft) naval appl.
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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 caliber size. The barrel is chromium-plated for extended life. The gun uses standard GAU-8 Avenger ammunition that is available in API (Armor-Piercing Incendiary), HEI (High-Explosive Incendiary) and APFSDS-T (Armor-Piercing Fin-Stabilized Discarding Sabot-Tracer) variants.

The gun can be converted to a caliber of 40×180 mm, which involves changing the barrel and a few key parts, to use the SuperShot 40 cartridge. It can also be converted to use the 30×170 mm RARDEN cartridge.