How a Lewis Machine Gun Works

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Wikipedia: The Lewis gun (or Lewis automatic machine gun or Lewis automatic rifle) 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,[3] and widely used by troops of the British Empire during the war. It had a distinctive barrel cooling shroud (containing a finned, aluminium breech-to-muzzle heat sink to cool the gun barrel) and top-mounted pan magazine. The Lewis served to the end of the Korean War, and was widely used as an aircraft machine gun during both World Wars, almost always with the cooling shroud removed, as air flow during flight offers sufficient cooling.

Type Light machine gun
Place of origin United States/United Kingdom
Service history
In service 1914–1953
Used by See Users
Wars

First World War
Easter Rising
Pancho Villa Expedition[1]
Emu War
Banana Wars
Irish War of Independence
Irish Civil War
Russian Civil War
Latvian War of Independence
Polish–Soviet War
Chaco War
Spanish Civil War
Second World War
Korean War
Malayan Emergency
1948 Arab–Israeli War
Vietnam War
Algerian War
The Troubles
Other conflicts

Production history
Designer

Samuel McClean
Isaac Newton Lewis
Birmingham Small Arms Co. Ltd.

Designed 1911
Manufacturer

Birmingham Small Arms Co. Ltd.
Savage Arms Co.

Unit cost £62 in 1918[2]
Produced 1913–1942
No. built 152,050 in World War II
50,000 chambered in .30-06
Variants

Mks I–V
Aircraft Pattern
Anti-Aircraft configuration
Light Infantry Pattern
Savage M1917

Specifications
Mass 28 pounds (13 kg)
Length 50.5 inches (1,280 mm)
Barrel length 26.5 inches (670 mm)
Width 4.5 inches (110 mm)
Cartridge

.303 British
.30-06 Springfield
7.92×57mm Mauser
7.62×54mmR

Action Gas-operated long stroke gas piston, rotating open bolt
Rate of fire 500–600 rounds/min
Muzzle velocity 2,440 feet per second (740 m/s)
Effective firing range 880 yards (800 m)
Maximum firing range 3,500 yards (3,200 m)
Feed system 47- or 97-round pan magazine
Sights Blade and tangent leaf







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