mauser m1916
The Mauser M1916, or Mauser selbstladekarabiner (self-loading carbine), was a semi-automatic rifle that used a delayed blowback mechanism and fed from 25-round detachable magazine.
Visually similar to the Fedorov Avtomat but with more rectangular trigger guard and top receiver shape, lack of metal barrel shroud, and charging handle on the left side.