far cry 6 is about as far cry as you'd expect (very much), but i just love the tank bullshit in the game
so, there are tanks randomly patrolling around, alone, not even with open hatches, that may seem little stupid, it's not, it's in fact dumb as fuck
but there's more, these tanks are basically T-55's, which is reasonable, but the game designers were probably afraid that whatever is left from the morozov design bureau may sue them, i guess, so the tanks are called 'petrov 1944' in game
now you obviously need a way to do something about them and you can't be expected to have a "believable" anti-tank weapon (there are some, but you may not have them and the tank is not like some end-game monstrosity, it appears right from the start randomly), so the wise designers figured out the tank has a weak spot vulnerable to whatever gun you have, which is an engine in the back, sitting there exposed and making it possible to kill the tank with like a mag of 7.62 rounds
to allow for some progression, there are "better" models of the tank, which are still T-55's, but the engine weak spot is covered by something you have to shoot first
but don't worry, if you feel that is stupid, you got yet another option. you can temporarily disable this 40's/50's soviet tank with an EMP pulse
somehow