Tank gun optics should be destructible (like driver and commander optics) and they should crack/become unusable if damaged or destroyed, or even killing crew behind if the projectile can penetrate the bulletproof glass. AT rifles retain usability even after well armoured vehicles are introduced and tanks become more vulnerable from range.
Yeah, I mean of you cant hit that speciffic part at that distance, I think we should be rewarded for it.
At the same time, i’d disallow damaging optics with machineguns and SMGs, since these can be spammed and could lead to disabling of the vehicle rather fast.