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 High-Standard High-Power, rear Interarms Mark X, rear; shimming required Mauser w/receiver ring 1.300" Swedish 96, rear; shimming required Mauser Mark X, rear; shimming required Mossberg, 695 and 800, front or rear Sears 51L, rear S&W Mauser actions with small receiver ring, rear Springfield 03, front; gunsmithing required Western Field 775 and 780, front or rear Note: This is only a single mount. You will need to order two mounts for mounting a scope.