The Heckler & Koch MP5 (from German: Maschinenpistole 5, meaning Submachine gun 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 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 40 nations and numerous military, law enforcement, intelligence, and security organizations. It is widely used by SWAT teams in North America.
During the Battle of Ginza, some Tokyo SWAT members uses MP5 to effectively held off the Imperial Troops and shot at the battering ram. Some Chinese operatives also uses MP5 with silent attachment during the Hakone Incident.