The M621 is a 20 mm automatic cannon of French design, developed by Nexter as on-board armament for armored vehicles, aircraft, helicopters and small coastal vessels of the French Navy.
Turreted cannon for helicopters.
Cannon pod for helicopters and light aircraft.
Door mounted cannon for helicopters.
Pintle-mounted cannon for vehicles and boats.
Cannon for naval ships.
Remote-controlled naval gun.