Weaver Grand Slam Steel Top Mount Base 3/8-Inch Grooved Receiver Matte Black

Weaver's precision-built all steel bases are machined to tight tolerances for a custom fit and a square-cut notch mates to the sturdy cross bolt in every Weaver Detachable ring. Custom hardened fastening screws included. Fits: Browning Models Bolt Action, Hi-Power, other calibers(older models), Mauser Actions & BBR LA/SA (Front base ONLY) Cil Models 950, 950-C, & 972-C Colt 57 Cooey 71 (Front base ONLY.) Enfield receiver cut down like a Winchester 70 (Front base ONLY.) H & R Models 300, 301, 330, 370 before 1973; 300, 301 LA - 1973 and after (270, 30-06, 7mm, 300 Winchester) Herters J9 Interarms Viscount Marlin Models 455 & MR7 Mauser Models 98FN, Swedish 96, & Bauer 3000 and 4000 Musgrave Models Mark I-IV Navy Arms Country Boy Muzzle Loader Savage (Round Top Receiver) Models 10, 12, 16, 510, 512, 516 SA Rifle 110 (E & S), 111, 112 (R, V, & FV), 116FSS (LA); 210 Shotgun; Striker Pistol Schultz & Larsen Sears Models 50, 51, 51L, & 53 Stevens 110E Voere Models 2150, 2165/1, 2165/2, 2165/3 & 2165/4 (Mauser action) Weatherby Models with FN Mauser actions Winchester Models 52(hole spacing same); 70 LA(hole spacing same & Different); 300 Magnum, 70 Super Express, 670, & 770 (Front base ONLY.) Notes: Mounting hardware included.