M230 chain gun
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The M230 Cannon is a 30 mm, single-barrel electrically-driven autocannon, using external electrical power to cycle the weapon between shots. It was designed and manufactured originally by Hughes Helicopters in Culver City, California. As of 2019,... Wikipedia
Action: Open bolt
Caliber: 30 millimetres (1.18 in) caliber
Designed: 1973
Effective firing range: 1,500 m (1,640 yd)
In service: 1983-Present
Length: 2,181 mm (85.9 in)
Muzzle velocity: 805 m/s (2,641 ft/s)