The Hawker Hurricane is a British single-seat fighter aircraft of the 1930s–40s that was designed and predominantly built by Hawker Aircraft Ltd. for service with the Royal Air Force (RAF). It was overshadowed in the public consciousness by the Supermarine Spitfire's role during Battle of Britain in 1940, but the Hurricane actually inflicted 60 percent of the losses sustained by the Luftwaffe in the engagement, and it went on to fight in all the major theatres of the Second World War. Hurricane Mk IIA Series 1 equipped with new and slightly longer propeller spinner, and fully replaced the machine-gun armament with four 20 mm (.79 in) Hispano Mk II cannons, two per side. Hurricane IIA Series 2 became the Mk IIC in June 1941, using a slightly modified wing. The new wings also included a hardpoint for a 500 or 250 lb (230 or 110 kg) bomb and, later in 1941, fuel tanks. By then performance was inferior to the latest German fighters, and the Hurricane changed to the ground-attack role, sometimes referred to as the Hurribomber. The mark also served as a night fighter and intruder with about three quarters converted to fighter bombers. There were IIC 4,711 built by Hawker between February 1941 and July 1944.