I am selling a Mack Bros bolt, it's a SA REM 700 bolt. It did not work on my remage build because the barrel needed a different recess cut into it and I didn't have the time. So just bought a PTG bolt. My loss, selling for $265 shipped they are $323 new. You will need a gunsmith to fit this bolt, due to the bolt. Barrel will probably need a different recess cut.