A Picatinny style scope mount designed to mount directly to .920" bull barrels. The mount cantilevers back over the receiver and utilizes one tension set screw in the rear of the mount for stability. It ensures that the scope will always be in alignment with the barrel regardless of any movement between the barrel and receiver. All Volquartsen bull barrels for the 10/22 will come drilled and tapped to accept this scope mount. If you are using on another after market barrel, the barrel would need to be drilled and tapped for this mount.