Heckler & Koch MP5K

The Heckler & Koch MP5 (from German: Maschinenpistole 5, "machine pistol model 5") is a 9mm submachine gun of German design, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch GmbH (H&K) of Oberndorf am Neckar. There are over 100 variants,[4] including a semi-automatic version.

The MP5 is one of the most widely used submachine guns in the world,[5] having been adopted by 40 nations and numerous military, law enforcement, intelligence, and security organizations.[3] In the 1990s, Heckler & Koch developed the Heckler & Koch UMP, the MP5's successor; both are available as of 2012.[6]