QUESTION :2. Why on soviet tanks did not appear machine gun,after increase of the level?
Thanks for the reply. 
ANSWER :if i understand you correctly, your asking for a mg on the tanks after lvl 3 veteracy. well, since the soviets dont have a build-able heavy mg outside their bunkers, it would be hard to animate i think. other than that, there is a tank with an mg on it, specifically the tank rider call in ability in the breakthrough doctrine. IMO it is a beast.+ when/if the tank dies you get an upgraded guard squad.
