Mark IX

Mark IX or Mark 9 often refers to the ninth version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."

Mark IX or Mark 9 can specifically refer to:

In technology

In military and weaponry

• BL 9.2 inch gun Mk IX–X (1899); a British 9.2 inch coastal defence cannon
• Mark IX 12-inch gun (1901); a British naval gun that was later used on land in the BL 12 inch Railway Gun
• Mark 9 (1915); an American 21-inch torpedo
• Mark IX tank; a World War I troop-carrying tank—the first armoured personnel carrier
• Ordnance QF 2 pounder (1936-1945); British mounted gun used in World War II
• Supermarine Spitfire Mk IX; the second most numerous Spitfire variant
• Floro MK-9 (2001); a submachine gun designed and built in the Philippines

Other vehicles

• Jaguar Mark IX (1959-1961); a British luxury car
• Lincoln MK9 (2004); a concept car

Other uses

• Mark 9 or Mark IX, the ninth chapter of the Gospel of Mark in the New Testament of the Christian Bible
• Mark IX Hawk; a fictional spacecraft in the Space 1999 TV series