The Gustloff Volkssturmgewehr was designed by Karl Barnitzke of the Gustloff-Werke for the Primitiv-Waffen-Programm ("primitive weapons program") in 1944 and was intended to be used by the Volkssturm. Production of the Gustloff Volkssturmgewehr occurred from January 1945 till the end of the war; roughly 10,000 were made.
This gun was initially called MP 507. The MP 508 was fairly similar except it had a pistol grip.
