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GAU-8
From ARRSEpedia
The General Electric GAU-8/A Avenger is a 30 mm, hydraulically-driven seven-barrel Gatling-type rotary cannon that is mounted on the United States Air Force's A-10 Thunderbolt II. It is the largest, heaviest and most powerful aircraft cannon in the USA military. The GAU-8 was specifically designed for the anti-tank role, and delivers a very powerful round at a high rate of fire.
