Standschütze Hellriegel M1915

Standschütze Hellriegel 1915 was a Austro-Hungarian water-cooled heavy submachine gun produced during World War I in very limited prototype numbers.

The submachine gun could be fed from standard box magazines, or from a large drum magazine which was not actually connected to the weapon and instead fed the cartridges through a flexible chute. The unusual appearance of this drum magazine has led many people to assume it is belt fed, however this is not the case with the rounds being unconnected from one another and are propelled along the drum and feed chute by a spring.

Little is known about the weapon, which it appears did not progress from prototype stage.