it seems that your pretty much constantly using the same firearm but,there is no cleaning of it. in real life you should clean your gun everyday if you have fired it or it will jam or explode if automatic. so if there is a feature to clean your gun to keep it from jamming (or exploding in your face) it will be good as new, but if you dont it will occasionally jam and possibly explode. If you don't take care of your gun it won't take care of you. and yes in real life if you fire a automatic in full auto and it has rust it will explode from gas the excess gas and the spark from the rust and the powder.pretty much automatic dont release all the gas in teh gun they keep the gas to pullback the mechanism and release it. 1.nitrosolvent to clean your gun 2 gun oil to lubricate your gun call me a idiot or whatever i really don't care and if you think it's completely and utterly stupid do some research.