Thats OP
M6 one shots almost all OKW vehicles..
Even if the vehicle survives, its Waaaayy to punishing having an immobilized vehicle.
Give usf normal mines
USF cannot be given "normal" mines as it is boring and symetrical. We already have okw and soviets with same mine and all that makes it not utterly boring is that those factions are on opposite sides.
It would be much better if those cheap mines were slightly buffed or, even better, if they were given significant damage and penetration but 0% crit possibility. That way clustering them would actually make sense and you could do significant damage to approaching german blitz before fighting it while giving wise german commander possibility to escape if he would micro well enough. The assymetrical ballance is a way to make game interesting and demanding to play.