Downfall
 

Looking at the Downfall page, the weapon identified as an MG34 isn't. The receiver and butt are all wrong - the picture isn't all that clear but I'm fairly certain that's a PK with an MG34 barrel shroud added.

You're right. I will post more pics of that mystery gun from the movie and try to determine what it is. In the film, it only fires semiautomatic, but I assume that was a directorial decision to show that the Germans were running low on ammunition. As you probably noticed I have never posted a pic of an MG34. I have a PKM but I don't have an MG34. My peers have all the WW2 belt feds, I've always leaned towards the more modern stuff.