American Rifle Company M-Brace 40mm Riflescope Mount 38mm Height 25 MOA Black. Designed for shooters who demand uncompromising strength precision and reliability the M-Brace Scope Mount ensures rock-solid alignmenteven under the harshest recoil forces. The M-Brace Scope Mount is built with an advanced serrated interface inspired by Hirth couplings used in high-power gas turbines and machine tools. These serrations provide an unrivaled mechanical lock between the scope mount and accessories like laser range finders ensuring that alignment remains rock-solideven under extreme recoil forces exceeding 200 lbs (900N). Unlike competing designs that concentrate stress in a single ring cap or an asymmetric mount the M-Brace distributes forces evenly and efficiently into the rifle receiver preserving both your optic and your zero. Specifications for American Rifle Company M-Brace 40mm Riflescope Mount: Manufacturer: American Rifle Company Fabric/Material: 7075 Aluminum Color: Black Base/Mount Type: Scope Mount Tube Diameter: 40 mm Ring Height: 38 mm Features of American Rifle Company M-Brace 40mm Riflescope Mount Simple and easy no-roll scope mounting Recoil Proof Non-Marring Scope Grip Serrated Accessory Interface Multi-Position Level Vial Excellent Return-To-Zero Designed to fit Picatinny (MIL-STD-1913) rails Package Contents: American Rifle Company M-Brace 40mm Riflescope Mount Instruction Sheet Bubble Level Level Mounting Screw American Rifle Company MB-M-40-38-25: M-Brace 40mm Riflescope Mount 38mm Height 25 MOA Black