The MP 40 is a submachine gun chambered for the 9×19mm Parabellum cartridge. It was developed in Nazi Germany and used extensively by the Axis powers during World War II. Designed by Heinrich Vollmer and entering service in 1939, it was heavily used by infantrymen and by paratroopers, on the Eastern and Western Fronts. Its advanced and modern features made it a favorite among soldiers and popular in countries from various parts of the world after the war. Contrary to its status as one of the most recognized WW2 guns out there, the airsoft MP40 is practically nonexistent in the airsoft industry with just the Umarex Airsoft MP40 Legends CO2 Version (by WinGun) being the only gbb MP40 airsoft gun in existence. Suffice to say there definitely is a market for an airsoft MP40 so keep posted in this space!