I think this movie is also called like, Stalingrad 3D ( which sounds like one of these cheap ass HISTORY CHANNEL BATTLE OF PACIFIC fps games XD).
Wonder if it hits the cinemas here in Sweden, I think its worth a look, Iam a big fan of full automatic and slowmotion ! Btw IIRC the Mg42 were never issued in Stalingrad? Correct me if Iam wrong!