I purchased my USR at a gun show about two months ago. Five 30 round mags, and one 10 round. It came with the original box. Was suposed to be new in box. That night I dismantled it and inspected. Since I was not too familiar with this rifle, I didn't know what to look for. The gas piston was bright and shiney. No marks behind the ejection port on the stock. No marks on the hammer. Took her to the range with my lovely wife, who wasn't real happy with me spending $2700 for a new gun, as I bought a PS90 in January. That was supposed to be my "one gun for the year." After firing 80 rounds, took the rifle home and cleaned it. Could not fully remove the slight charring on the gas piston. It also had some slight semicircular marks behind the ejection port opening on the stock. "Put some velcro stick on stuff there." That solved the problem. I like the USR more than the AUG because it does have the different bolt carrier with the roller on top, and especially because it has the bull barrel. My match AR15 has a bull barrel, and it is supposed to give greater accuracy.