can the panzer IV 75mm gun ammo rack anything?

TeriyakiTanker: I’m going to go ahead and guess you aren’t hitting the ammo rack but even if you are with a gun that small it could easily take multiple hits to do enough module damage to get an explosion and if course after the first time you damage the ammo rack most people will use their repair kit. So remember not all ammo racks blow up the vehicle, so you could be ammo racking them without destroying them in one shot.