Weaver Top Base Mount 48045

Weaver's Top Mount Base is machined to tight tolerances for a custom fit. It offers maximum strength for rings to hold tight and is constructed of aluminum. 

Fits Browning bolt action BBR, Hi-Power; Churchill 972-C; Colt 57; H&R 300, 301, 330 & 370 (pre 1973); Marlin 45.