German Volkssturmgewehr 
3d printed by Brickssoldier
Plain version, unpainted. Color: Black.
 
The Volkssturmgewehr ("People's Storm - Rifle") is the name of several rifle designs developed by Nazi Germany during the final months of World War II (February 1945-May 1945). They share the common characteristic of being greatly simplified as to adapt with the severe lack of resources and industrial capacity in Germany during the final stages of the war. The Volkspistole was a partner program, almost identical, but for pistols instead.
The weapon's name can be translated directly either as "People's assault rifle" or "Volkssturm rifle." Volkssturm, the German late war militia home defense force, means "People's Assault"; Sturmgewehr translates as "assault rifle".