Stg-44 not unlocking in game/STG44 permanently "Available from next round"

Hi Guys,

My Stg-44 hadn't unlocked although I am assault lvl 14. It always says that the gun will unlock next round.

I have tried logging in and out of origins and have restarted the game. 

Further I have also tried deleting the app data of orginis in %localapps%.

Nothing works ☹️

Is there a fix for this?

Ty in adance!