The Ordnance QF 17-pounder was a British anti-tank gun developed during World War II. It was designed to counter the heavily armored German tanks, such as the Panzer IV and Tiger I. The gun fired a 17-pound (7.62 kg) projectile, which provided significant armor penetration capabilities, making it one of the most effective anti-tank weapons of its time. Introduced in 1943, the 17-pounder was mounted on various platforms, including the Sherman Firefly tank and towed versions for infantry support. Its versatility and firepower contributed to the success of Allied forces in the later stages of the war, particularly during the Battle of Normandy.