Back2Fronts is an extensive mod that will overhaul your Call of Duty 2 game to a next level. This mod brings more variety, intensity, realism and battle-like experience. Try new weapons, fight new enemies, fulfil new missions and explore new options. Mod is SP and MP friendly (although primary part is SP).
Because the last Russian mission at Leningrad takes place in 1944 the player and both enemy and friendly AI has access to latewar weaponry. As you can see the Russian commissar uses a PPS-43.
Nice!