The QF 4.7-inch Gun is a naval artillery piece developed in the early 20th century, primarily used by the Royal Navy. It was designed to provide effective fire support against surface ships and aircraft. The gun has a caliber of 4.7 inches (120 mm) and was typically mounted on various classes of warships, including destroyers and cruisers. This gun was notable for its quick-firing capability, allowing for a higher rate of fire compared to earlier naval guns. It played a significant role during both World Wars, contributing to naval engagements and coastal bombardments, showcasing its versatility and effectiveness in combat situations.