MP 18
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The MP 18 is a German submachine gun designed and manufactured by Bergmann Waffenfabrik. Introduced into service in 1918 by the German Army during World War I, the MP 18 was intended for use by the ... Wikipedia
Designed: 1917
Action: Open-bolt blowback
Barrel length: 200 mm (7.9 in)
In service: 1918–1945 (Germany)
Mass: 4.18 kg (9.2 lb); 4.0 kg (8.8 lb) (MP 28/II)
Muzzle velocity: 380 m/s (1,247 ft/s)
No. built: Fewer than 30,000