Original Item: Only One Available. This machine gun has been deactivated to non-firing state following guidelines provided by the ATF.

The Browning .303 Mark II was the standard gun used on British aircraft during the 1930s and Second World War. It was adopted by the Royal Air Force (RAF) and manufactured under license by Vickers Armstrong and BSA. The design was based on the 1930 Pattern belt-fed Colt-Browning machine gun with a few minor modifications. The muzzle extension was prone to fouling from the cordite-based ammunition and the RAF redesigned the muzzle extension with chrome plating it to make the surface smoother and cooling fins were also added.

The gun was designed to fire hydraulically as a wing-mounted machine gun on the Supermarine Spitfire and Hawker Hurricane and as hand-fired mount for use in Avro Lancaster bombers and reconnaissance aircraft. It had a rate of fire of 1,150 rounds per minute a muzzle velocity of 2,660 ft/sec. The major advantages were that it was lighter, accurate, and available in large numbers. Near the end of the war, the RAF began adopting .50 caliber machine guns in their bombers.

This example is offered in excellent display condition. It has a destroyed right side plate per ATF guidelines. It is nicely marked on the top cover: MKII BS 130966 SD.

The Browning Machine Gun was adopted by the Royal Air Force as a replacement for the .303 Vickers machine gun and manufactured by Vickers Armstrong and BSA to fire the British .303 inch (7.7 mm) round and named "Browning .303 Mk II" in British Service. It was essentially the 1930 Pattern belt-fed Colt–Browning machine gun with a few modifications for British use, such as firing from an open bolt to avoid cooking off the cordite rounds and a lighter bolt, increasing the rate of fire, much like the US .30 M2/AN aircraft variant. It was designed to fire hydraulically or pneumatically as a wing mounted machine gun but was also adopted as hand-fired mount for use in bombers and reconnaissance aircraft. It had a rate of fire of 1,150 rounds per minute. The license was issued to BSA by July 1935.

The Browning .303 was used as the RAF and Fleet Air Arm (FAA) primary fixed forward firing aircraft armament before the war, both in synchronized mounts (firing through a spinning propeller) on pre-war biplane fighters (Gloster Gladiator, Hawker Fury) and on the UK's new 'eight-gun fighters' the Hawker Hurricane and Supermarine Spitfire and the naval Fairey Fulmar, and as secondary weapons in mid-war variants of the Spitfire, as well as being fitted in single, double or quadruple mounts as offensive weapons for the Bristol Blenheim, the Fairey Battle, Handley Page Hampden, Martin Maryland/Baltimore, Fairey Swordfish, Lockheed Hudson, Douglas Boston, Blackburn Skua and Bristol Beaufort. It was also used as a turret gun in various Boulton Paul or Nash & Thompson turrets on bombers and flying boats. Even after the introduction of autocannon as primary fighter armament .303 Brownings were retained as supplementary weapons on many aircraft including later versions of the Spitfire, as well as fighter-bomber and night fighter versions of the de Havilland Mosquito, among others.

For hand-held moveable mount use the Vickers K machine gun was preferred. There is pictorial evidence of the .303 Browning being placed on improvised bipods for ground use during the early campaigns in Burma and Malaysia.