Seriously your asking what to use to clean it with? You bought an AR and don't know that, I relize you must be new to guns but damn you must have learned that in the restricted course. wow! Take it all apart including the bolt carrier, separate the upper and lower and clean with break free, swab the barrel a few times wet then a dry cloth. This is really basic stuff. Sorry! I don't mean to be an ass but if your going to shoot restricted firearms you should have a basic knowledge of guns/ rifles first.