Hawker Beechcraft proposes F-35 cannon for AT-6. ... A French 20mm gun is another option under review to either replace or augment the .50cal gun pod that is integrated on the twin-seat fighter, ...

The principal change is in its armament, which is now four 20–mm. cannon or twelve machine guns, in the place of the original eight machine guns. ... Nature - New Hawker ‘Hurricane’ Aircraft.

Now sitting in pride of place, the Hawker Tempest II is a major new attraction at the RAF Cosford Museum. ... It's built around a powerful engine and had four 20mm cannons, ...