Heckler & Koch MP5
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The Heckler & Koch MP5 is a submachine gun developed in the 1960s by German firearms manufacturer Heckler & Koch. It uses a similar modular design to the Heckler & Koch G3, and has over 100 variants and clones, including selective fire,... Wikipedia
Bullet size: 9mm
Action: Roller-delayed blowback, closed bolt
Designed: 1964–1966
Effective firing range: 200 m (656 ft)
Feed system: 15-, 30-, 40-, or 50-round detachable box magazine, 50-round drum magazine and 100-round Beta C-Mag drum magazine
In service: 1966–present
Length: 680 mm (27 in)