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: BSA Monarch medium action .22, .243 and .308 calibers BSA CF2 & Monarch long action Churchill Highlander Enfield receiver cut down Herters U9 round receiver Interarms Howa Mossberg 1500 and 1700 Raptor Arms Remington 700/78 long action and 725 Remington 700 muzzleloader Remington 700 and 78 short action S&W 1500, 1600 and 1700 Weatherby Ultra Lightweight Weatherby Vanguard shimming required Note:This is only a single mount. You will need to order two mounts for mounting a scope.