MP40
The MP40, officially Maschinenpistole 40, is a 9x19mm Parabellum submachine gun developed by the German firm Erma Werke. It was designed by Heinrich Vollmer and introduced into service with the Wehrmacht in 1940. The MP40 was a relatively simple and robust weapon, notable for its stamped metal construction and telescoping stock, which made it more compact for vehicle crews and paratroopers.
It fired from an open bolt and had a rate of fire of approximately 500 rounds per
While often associated with elite troops, the MP40 was issued to a wide range of German personnel.