[Error] Problem with AT gun

[IGNAT161]

Problem: Doesn't work PZB 784 (r) I choose PZB 784 (r) but I appear with PTRS Despite that written in the role menu that I use PZB both for Soviet and for the German sides.
I tried
To reinstall game
To reinstall steam
To change language
To check up a cache
To remove a folder ROGame in my documents.
what can i try else ?

 

[Zetsumei]

When the germans captured the russian PTRS rifle they renamed it and gave it to their troups and the PzB 784(r) with the (r) standing for it being a Russian weapon that has been renamed. (similarly (p) means that its for instance originally a polish weapon like the PzB 770(p) which was a renamed polish Maroszek WZ 35 anti tank rifle, or so google search tells me )

 

[IGNAT161]

In a reality these guns are identical, but in game it is different rifles. PZB much more poverful . I used PZB until 25 levels and then it was gone, in menu is used PZB but respawn with PTRS and it is a game error which it is necessary to correct.