 In 1927 he designed the VMG 1927 and developed it later in collaboration with Mauser into MV 31 (Mauser-Vollmer 1931).This gun however was not adopted for service.Instead the MG 34 general-purpose machine gun (GPMG), also developed by Vollmer, but on the basis of the Soloturhn S2-100 (MG 30) would eventually equip the German military in large numbers.