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.
Variants
=== THL 20 === Turreted cannon for helicopters.
=== POD NC 621 === Cannon pod for helicopters and light aircraft.
=== ARX 20 === Remotely controlled weapon station with M621 and a 7.62×51mm machinegun.
=== SH20 === Door mounted cannon for helicopters.
=== CP 20 === Pintle-mounted cannon for vehicles and boats.
=== 15A === Cannon for naval ships.
=== NARWHAL === As remote-controlled naval gun on the Nexter Narwhal 20A.
== See also == GIAT 30 20 mm modèle F2 gun M197 electric cannon