With the advance armor of British and American tanks, you need a very massive punching power to destroy these Western tanks.
Imagine the problems and logistic to house more ammo for these twin guns? This would be a nightmare to house the additional ammo.
Also, look at the turret on that twin guns housing, this is massive and very weak in protection. Whatever this is, I don't think this Russian tank is a serious design to be field on the battle field.
