The Vickers K, also known as the Vickers Gas Operated (VGO) is a British aircraft-mounted machinegun used extensively by the Republican Air Force (RAF) throughout World War II. It's mechanically more similar to the Bren Gun than it is to the similarly named Vickers Machinegun, though it differs from both due to its high rate of fire, capable of delivering up to 1,200 RPM from a 100-round drum magazine of .303 British, comparable to the infamous MG 42. The Vickers K is gas-operated and air-cooled. As the war progressed, the Vickers K was adapted for ground use by special forces, including the Special Air Service, who valued its reliability and firepower during raids and special operations.