Examples
As member of the AT-Gun crew (screenshot from Sokolonko, was posted by SneakEye)
As tank crew member
Possible implementaion of the sergant with different 3D-Model - guards model without cape, which looks pretty the same. It doesn't have sergant shoulder mark, but current one is incorrect as well due to after-WWII variant of mark(CA on it stands for Советская Армия (Soviet Army), during war it was officialy named as Workers and Peasants Red Army (Or simply Red Army) and used mark like on image below.
Current
How can be
Relic Entertainment
cblanco ★ 
보드카 중대 
VonManteuffel 
Heartless Jäger 
