To arm them under conditions of depleted manpower and limited available production capacities the Primitiv-Waffen-Programm ("primitive weapons program") was initiated. It called for weapons that were as easy as possible to produce. Walther designed the Volkssturmgewehr VG 1 rifle, Spreewerk Berlin the VG 2, Rheinmetall the VG 3, Mauser the VG 4 and Steyr the VG 5 (a.k.a.