A guy i work with is trying to sell me his ar. I dont know what kinda price he is talking yet. But it will be cheap between 200-400.I need some info on it though. The only markings on it are E.A. Co., right below that it says KR. SPR. LA., On the side where the roll mark goes it has te model number and it says J 15.. Any info would be great. My dad is thinking of buying this if the price is right and we are just trying to do some research.