Millett Angle-Loc Two Peice Steel Bases. These two-piece bases are the perfect match for our very popular Angle-Loc rings. Millett two-piece steel bases are 30 to 50 percent lighter than other brands. We've removed any excess weight without sacrificing strength. Features: Exclusive interlocking alignment guides. Less ring gap for cleaner lines and a stronger mount. Millett Angle-Loc clamping system is windage adjustable and rock-solid. Recoil-proof magnum splines prevent scope slippage and dampen vibrations. Specification: Ring A-Height B-Height C-Height D-Height Angle-Loc 1 in. 0.275 0.395 0.525 1.02 Angle-Loc 30mm 0.319 0.482 0.626 - .22 Cal 1 in. 0.29 0.42 0.594 - .22 Cal 30mm - 0.422 - - Ruger M77 1in. - R-.586 F-.473 R-.699 F-.586 - Ruger M77 30mm - R-.510 F-.397 R-.623 F-.510 - Sako 1in. 0.412 0.532 0.662 - Sako 30mm 0.347 0.614 0.759 - Tikka 1 in. 0.473 0.586 0.24 - Tikka 30mm 0.395 0.508 0.621 - Brno CZ, ZKM 1in. 0.473 0.586 0.724 - Brno CZ, ZKM 30mm 0.395 0.508 0.621 - Brno ZKK 1 in. 0.345 0.46 0.59 - Brno ZKK 30mm 0.404 0.55 0.698 -