American Rifle Company Air Brace 34mm Riflescope Mount 38mm Height 20 MOA Black. Unlike traditional mounts the Air Braces forward ring actively supports the scope working in harmony to create a stronger more stable structural system. The Air Brace makes the ideal lightweight cantilever scope mount for the discerning shooter. Specifications for American Rifle Company Air Brace 34mm Riflescope Mount: Manufacturer: American Rifle Company Fabric/Material: 7075 Aluminum Color: Black Base/Mount Type: Scope Mount Tube Diameter: 34 mm Ring Height: 38 mm Features of American Rifle Company Air Brace 34mm Riflescope Mount Simple and easy no-roll scope mounting Recoil Proof Non-Marring Scope Grip Excellent Return-To-Zero Designed to fit Picatinny (MIL-STD-1913) rails Package Contents: American Rifle Company Air Brace 34mm Riflescope Mount Instruction Sheet Bubble Level American Rifle Company AB-M-34-38-20: Air Brace 34mm Riflescope Mount 38mm Height 20 MOA Black