The M621 is a 20 mm automatic cannon of French design, developed by KNDS France as on-board armament for armored vehicles, aircraft, helicopters and small coastal vessels of the French Navy. It fires the same 20×102mm ammunition as the M61 Vulcan.
The M621 is a 20 mm automatic cannon of French design, developed by KNDS France as on-board armament for armored vehicles, aircraft, helicopters and small coastal vessels of the French Navy. It fires the same 20×102mm ammunition as the M61 Vulcan.
Source: Wikipedia "M621 cannon" · CC BY-SA 4.0
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