Question: Who was the Vickers .50 originally produced for?
Related documents: [0]  [DOC] The Vickers machine gun or Vickers gun is a name primarily used to refer to the water-cooled .303 British (7.7 mm) machine gun produced by Vickers Limited, originally for the British Army. The machine gun typically required a six to eight-man team to operate: one fired, one fed the ammunition, the rest 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. [END] 
[1]  [DOC] The Vickers .50 machine gun, also known as the 'Vickers .50' was basically similar to the .303 in Vickers machine gun but scaled up to use a larger-calibre 0.5 in round. It saw some use in tanks and other fighting vehicles, but was much more commonly used as a close-in anti-aircraft weapon on Royal Navy and allied ships, typically in a four-gun mounting. The Vickers fired UK 12.7×81mm 50-calibre ammunition, not the better known US 12.7×99mm (.50 BMG). [END] 
Answer: 
the British Army
the British Army