an Entity references as follows:
The Heckler & Koch MP5 (German: Maschinenpistole 5) is a 9x19mm Parabellum submachine gun, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch. There are over 100 variants and clones of the MP5, including some semi-automatic versions. The MP5 is one of the most widely used submachine guns in the world, having been adopted by over forty nations and numerous military, law enforcement, intelligence, and security organizations.