The Giat M621 is a French 20 mm calibre, gas-operated delayed blowback single-barrel cannon produced since 1974. The Giat M621 was primarily designed for use on small ground vehicles and helicopters, and was developed between 1962 and 1973 based on the AME582. The Giat M621 has a selectable rate of fire of single-shot, 300 and 740 rounds per minute, and a muzzle velocity of between 990 and 1026 metres per second offering an effective range of 1500 metres. Research Giat M621
The Giat M621 is a French 20 mm calibre, gas-operated single-barrel cannon produced since 1974 and fitted to aircraft. The Giat M621 was primarily designed for use on helicopters, and was developed between 1962 and 1973 based on the AME582. The Giat M621 has a selectable rate of fire of single-shot, 300 and 740 rounds per minute, and a muzzle velocity of 1030 metres per second offering an effective range of 1500 metres. Research Giat M621
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Abbreviations
Research Giat M621
