i merely thought it would be nice to have some sort of anti tank infantry that is not guards
According to Wikipedia soviets mostly had AT nades, early the RPG-40 (stands for "ruchnaya protivotankovaya granata" not rocket-propelled-grenade) which could penetrate 20mm armor and later the RPG-43 which could penetrate up to 75mm. Other than that Wiki only lists AT rifles (PTRD, PTRS) and leased allied or captured german weapons. Therefore, Relic could introduce (doctrinal) soviet squads with leased bazookas or captured panzerschrecks ("Target confirmed, but where is the trigger on that thing comrade?").