American Rifle Company M-Brace 40mm Riflescope Rings 28mm Height Black. Engineered to hold firm under the heaviest recoil without marring or indenting your scope these rings ensure rock-solid stability and excellent return-to-zero performance every time. Specifications for American Rifle Company M-Brace 40mm Riflescope Rings: Manufacturer: American Rifle Company Base/Mount Type: Scope Mount Tube Diameter: 40 mm Fabric/Material: 7075 Aluminum Color: Black Features of American Rifle Company M-Brace 40mm Riflescope Rings 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 M-Brace 40mm Riflescope Rings Instruction Sheet American Rifle Company MB-R-40-28: M-Brace 40mm Riflescope Rings 28mm Height Black