It was internally polished and broken in by hand lapping. The crown was also redone and the gas ports were deburred and polished. Not that there were burrs but the gunsmith did it so he could polish. The gun had minor work done to the bolt and thats about it. The barrel work cost me 235.00 and any good gunsmith could do it. My next slug gun is a Tar Hunt. Waiting for my Uncle Sam check then im gonna order.