Lewis gun
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The Lewis gun is a First World War–era light machine gun. Designed privately in the United States though not adopted there, the design was finalised and mass-produced in the United Kingdom, and widely used by troops of the British Empire during... Wikipedia
Designed: 1911
Action: Gas-operated long stroke gas piston, rotating open bolt
Cartridge: .303 British.30-06 Springfield; 7.92×57mm Mauser; 7.62×54mmR
Effective firing range: 880 yd (805 m)
Feed system: 47- or 97-round pan magazine
In service: 1914–1953
Length: 50.5 in (1,283 mm)