Mark IX Armstrong Whitworth 12-inch 40-calibre naval gun BL 9.2 inch gun Mk IX–X Bliss-Leavitt Mark 9 torpedo British 21-inch torpedo Floro MK-9 Jaguar Mark IX Lincoln MK9 Mark 9 Mark IX Hawk Mark IX tank Ordnance QF 2 pounder Supermarine Spitfire variants part two W9 (nuclear warhead)