M1941 Johnson machine gun
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The M1941 Johnson Light Machine Gun, also known as the Johnson and the Johnny gun, was an American recoil-operated light machine gun designed in the late 1930s by Melvin Johnson. It shared the same operating principle and many parts with the M1941... Wikipedia
Designed: 1940
Weight: 13 lb
Effective firing range: 600 m (660 yd)
Feed system: 20-round, single stack-column detachable box magazine
In service: 1940–1961
Length: 42 in (1,100 mm)
Muzzle velocity: 2,800 ft/s (850 m/s)