Weaver

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 BLR - Colt Coltsman in 223 243 and 308 cailber (round receiver) - Mossberg Models 810 & RM7 (rear base only) - Sauer SHR 970 - Western Field 730 (rear base only) - Winchester 52 with the Hole Spacing Different (rear base only)