One-piece construction blends the ring and base into a single unit. Eliminating the ring/base joint not only keeps weight to a minimum, it provides a stronger mount. Each ring cap is 5⁄8' wide, with four, TORX screws, to keep large scopes from slipping or shifting. Designed by Mel Forbes of New Ultralight Arms. SPECS: 7000 series aluminum, black, anodized, matte finish. Accepts 1' dia. scopes, unless otherwise listed in fits column for 30mm dia. scopes. Height from bottom of ring to top of receiver: Low - .400' (10.1mm), Med - .500' (12.7mm). High - .640' (16.3mm), X?High - .740' (18.8mm). Approx. weight 2.1 oz. (59 g). Some heights vary, see chart below. Rem. 700 also fits 721/722/725 and 40X models. Rem. Model Seven fits receivers with four screw holes. Savage AccuTrigger fits round top centerfire receivers with AccuTrigger. Win. 70 fits .860' rear hole spacing only.