Each Weaver base is machined to tight tolerances for a custom fit. These Aluminum bases offer maximum strength for rings to hold tight. Includes custom-hardened fastening screws for mounting . Fits: BSA Monarch medium-action .22, .243 & .308 calibers BSA CF2 & Monarch long-action Churchill Highlander Enfield receiver cut-down like Remington 721 Herters U9 round receiver Interarms Howa Mossberg 1500 & 1700 Raptor Arms Remington 700/78 long-action & 725 Remington 700 muzzleloader Remington 700 & 78 short-action S&W 1500, 1600 & 1700 Weatherby Ultra Lightweight Weatherby Vanguard shimming required
