CNC-machined base spreads recoil to help keep scopes, even heavy ones, on the gun, and, precisely zeroed from shot to shot. Angled screw wedges against the receiver opening to provide another recoil lug to divert recoil away from the base and mounting screws. Tolerances for straightness and flatness are held within .002" to create a solid platform for your optics. Bedding-compound inletting on mount bottom helps you get a perfect, base-to-receiver fit. Self-centering TorxA(R) screws help prevent slipping during use. Accepts Picatinny and Weaver-style rings. Mfg: Farrell Industries SPECS: Steel, black-oxide finish. Length approximately equal to action length, 9/16" (14mm) high. Recoil lug screw is A 1/4"-28, mounting screws are 6-48.