Each Weaver base is machined to tight tolerances for a custom fit. These Aluminum bases offer maximum strength for rings to hold tight. Custom hardened fastening screws come with every Weaver base Fits Browning BLR, front or rear Colt Coltsman .223, .243 and .308 caliber round receiver, front or rear Mossberg 810 and RM7, rear Sauer SHR 970, front or rear Western Field 730, rear Winchester 52 with different hole spacing, rear; gunsmithing required Winchester 61 octagon barrel, rear Note :This is only a single mount. You will need to order two mounts for mounting a scope.
