The QF 3-inch Gun is a British artillery piece developed in the early 20th century, primarily used during World War I and World War II. It was designed for anti-aircraft and naval purposes, featuring a quick-firing mechanism that allowed for rapid shots. The gun was known for its versatility and effectiveness against both aircraft and surface targets. This artillery piece was mounted on various platforms, including ships and ground vehicles, enhancing its mobility. The QF 3-inch Gun played a significant role in several military operations, contributing to the effectiveness of the British forces during its service life, particularly in the Royal Navy.