I'm not sure this is a bug but surely the rifles and mg's when fired from the passenger slot of vehicles should be more accurate as they are mounted on the tank. The only reason I mention this is because the only passengers in tanks or apc's I see are nade spammers or mortars and rpg's. Which I guess is it a bit biased towards the grenadier and also in normal wars passengers are usually exclusively using mg's and never mortars or rockets as the tank does that job anyway
The rifleman magine gun isn't accurate when crouched. Also its already hard enough to aim when the vehicle is turning all over the place so surely increasing the accuracy won't hugely unblance the game
I need to do more experiments but one thing i have found out is that: you know the way that when you run around in ironsight your ironsight sways from side to side? if you go ironsight in a vehicle and it starts moving around then the same thing happens. curious. makes me think that this may be where the missing accuracy goes.
accuracy in a vehicle is very bugged right now: http://empiresmod.com/bug_tracker/view.php?id=645 don't try firing if your tank is on a hill.