Heckler & Koch MP5A3

The MP5 (German: Maschinenpistole 5) is a 9mm submachine gun, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch GmbH (H&K) of Oberndorf am Neckar.

The MP5 is one of the most widely used submachine guns in the world, having been adopted by 40 nations and numerous military, law enforcement, intelligence, and security organizations.

The Morrow Project issues the MP5A3 variant, which features a retractable buttstock and the SEF (Safe, Semi-Automatic, Automatic) trigger group.