GAU-13
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The General Electric GAU-13/A is a 30 mm electric Gatling-type rotary cannon derived from the GAU-8 Avenger cannon. Wikipedia
Caliber: 30 mm caliber
Designer: General Electric
Feed system: Linkless feed system
In service: 1970s–present
Mass: 333 lb (151 kg)
Muzzle velocity: 3,600 ft/s (1,100 m/s)
Rate of fire: 2,400 rpm (rounds per minute)