This is a reproduction of one of the great oddities of the Third Reich arsenal, the "krummlauf" device was a cause of a great deal of confusion on the part of the Allies when examples were captured. As a mechanical concept, curving a barrel to change the path of a bullet seems more like something plagiarized from the Bugs Bunny playbook, but the Germans actually did it. The first examples were built for test-firing high-powered anti-aircraft weapons, allowing test shots at elevated angles, and were later adapted for field use. A krummlauf-equipped assault rifle or machine gun could be used by infantry to fire over barricades or around corners without exposure, or mounted in compact ball turrets on tanks and vehicles as a point defense weapon against sappers and enemy infantry. In addition to being equipped with the distinctive prismatic sight that allowed the operator to see what he was aiming at, this model is equipped with a later adjustable gas bleed device, a modified rifle grenade launching tube, and a wooden handgrip. Also included with the device is an inert StG 44 (some original components assembled around an inert alloy receiver), one "qlv" marked MP44 magazine, and a loose gas piston and bolt.

Very good as assembled/reproduced, with 70% of the blue finish on the krummlauf, with areas of brown patina, some flaking and pitting on the prism sight housing, and mild handling marks overall. The prism sight itself is in good order. The dummy receiver and magazine are in rough shape, with the other StG components appearing good overall.