The QF 3.7-inch Gun is a British naval artillery piece developed in the early 20th century. It was primarily used during World War II for anti-aircraft and naval bombardment roles. The gun features a quick-firing mechanism, allowing for rapid firing rates, which made it effective against fast-moving aerial targets. This artillery piece was mounted on various ships and land platforms, enhancing its versatility. The QF 3.7-inch Gun was known for its reliability and accuracy, contributing to the defense of naval fleets and coastal installations during the war. Its design influenced subsequent developments in naval artillery.