SPECS: 7075 T6 aluminum, natural finish. Steel, 6-48 tpi x 3⁄8" mounting screws. 1.9 oz. weight. Fits Savage round top, short action receivers using factory pre-drilled scope base holes. Picatinny - 6" (15cm) long x 13⁄16" (2.1cm) wide. Standard - .41" (10.4mm) high. 20 MOA - .38 -.41" (9.6-10.4mm) high, tapered. Davidson - 6" long x 72" (1.8cm).wide. Standard - .54" (13.7mm) high. 20 MOA - .50 -.54" (12.7-13.7mm) high, tapered.