Pistolet maszynowy Mors Country Poland Type Submachine gun Manufacturer Fabryka Karabinow Introduction 1939 Specifications Weight 4.25 kg (without magazine) Length 970 mm Barrel length 300 mm Cartridge 9x19mm Parabellum Action blowback Rate of fire 400 rds/min Muzzle velocity 400 m/s Effective range 440 m Feed system 24 round magazine Sights Adjustable Iron Sights

The Pistolet maszynowy wz.39 Mors was a Polish submachine gun designed by Piotr Wilniewczyc and Jan Skrzypiñski between 1936 and 1938. It was to become the standard SMG of the Polish Army some time in the 1940s. However, its production was halted by the Invasion of Poland and World War II.

The design was generally modelled after the German Erma-Vollmer SMG. Common feature of both was a wooden butt and forward pistol grip, most noticeable difference was magazine sticking downwards in Mors instead of to the left side. The SMG was to be issued to some of the infantry units, as well as to tank crews and boarding parties of the Polish Navy and armoured trains. Later the idea of equipping tank crews was abandoned due to size. After extensive tests the construction proved to be reliable and durable. The first series was ordered in March of 1939 and additional purchases was planned. However, until September of 1939 the Fabryka Karabinów in Warsaw produced only 39 pieces, 3 of them being prototypes. After the start of hostilities, all were issued to one infantry battalion and were used with success during the battle for Warsaw.