Vickers machine gun

The Vickers machine gun or Vickers gun is a water-cooled .303 British (7.7 mm) machine gun produced by Vickers Limited, originally for the British Army. The gun was operated by a three-man crew but typically required more men to move and operate it: one fired, one fed the ammunition, the others helped to carry the weapon, its ammunition, and spare parts. It was in service from before the First World War until the 1960s, with air-cooled versions of it on many Allied World War I fighter aircraft.

The weapon had a reputation for great solidity and reliability. Ian V. Hogg, in Weapons & War Machines, describes an action that took place in August 1916, during which the British 100th Company of the Machine Gun Corps fired their ten Vickers guns to deliver sustained fire for twelve hours. Using 100 barrels, they fired a million rounds without breakdowns. "It was this absolute foolproof reliability which endeared the Vickers to every British soldier who ever fired one. It never broke down; it just kept on firing and came back for more."

The Vickers machine gun was based on the successful Maxim gun of the late 19th century. After purchasing the Maxim company outright in 1896, Vickers took the design of the Maxim gun and improved it, inverting the mechanism as well as reducing its weight by lightening and simplifying the action and using high strength alloys for certain components. A muzzle booster was also added.

The British Army formally adopted the Vickers gun as its standard machine gun under the name Gun, Machine, Mark I, Vickers, .303-inch on 26 November 1912. There were shortages when the First World War began, and the British Expeditionary Force was still equipped with Maxims when sent to France in 1914. Vickers was threatened with prosecution for war profiteering, due to the exorbitant price demanded for each gun. As a result, the price was much reduced. As the war progressed, and numbers increased, it became the British Army's primary machine gun, and was used on all fronts during the conflict.

When the Lewis Gun was adopted as a light machine gun and issued to infantry units, the Vickers guns were redefined as heavy machine guns, withdrawn from infantry units, and grouped in the hands of the new Machine Gun Corps. When heavier 0.5 in (12.7 mm) calibre machine guns appeared, the tripod-mounted, rifle-calibre machine guns such as the Vickers were further re-classified as "medium machine guns". After the First World War, the Machine Gun Corps (MGC) was disbanded and the Vickers returned to infantry units.

Before the Second World War, there were plans to replace the Vickers gun as part of a widescale change from rimmed to rimless rounds; one of the contenders was the 7.92mm Besa machine gun (British-built Czech ZB-53 design), which eventually became the British Army's standard tank-mounted machine gun. However, the Vickers remained in service with the British Army until 30 March 1968. Its last operational use was in the Radfan during the Aden Emergency. Its successor in UK service is the British L7 variant of the FN MAG general purpose machine gun.

In 1913, a Vickers machine gun was mounted on the experimental Vickers E.F.B.1 biplane, which was probably the world's first purpose-built combat aeroplane. However, by the time the production version, the Vickers F.B.5, had entered service the following year, the armament had been changed to a Lewis gun.

During World War I, the Vickers gun became a standard weapon on British and French military aircraft, especially after 1916, initially in a single gun configuration (Nieuport 17, SPAD VII, Sopwith Triplane), increased to a twin-gun standard in later war fighters (Nieuport 28, SPAD XIII, Sopwith Camel), with exceptions such as the S.E.5, which had a single synchronized Vickers and a Lewis gun mounted above the upper wing. Although heavier than the Lewis, its closed bolt firing cycle made it much easier to synchronise to allow it to fire through aircraft propellers. The belt feed was enclosed right up to the gun's feed-way to inhibit the effect of wind. Steel disintegrating-link ammunition belts were perfected in the UK by William de Courcy Prideaux in mid-war and became standard for aircraft guns thereafter. From 1917 to 1919, French Manufacture d'armes de Châtellerault produced under license .303 Vickers machine guns (240 were delivered before the Armistice) but most of the French aircraft Vickers machine guns were British-made.