Came across this one in my travels. Posted somewhere ? 91/30 with bayonet attached and seems to be wearing the Russian two cell pouch. Typical private, guard , century Ect..
The rifle looks to be a French Berthier. I think Model 07/15 from the look of the magazine floorplate. I would have thought most of them converted to the Model 1916 standard by WW2 though. Possible a former Polish Berthier as well.
Same opinion M16 Berthier, most real the bayonet was already shortened by germans as it doesnt looks like 52cm long blade. The ammo pouch could be normal CS one, or polish.