Featuring a rigid lightweight design our Ultralight 34mm Extended Scope Mount features a rear ring that is pushed forward 1″ resulting in better eye relief. This scope mount is designed to fit AR type upper receivers with Mil-Spec 1913 Picatinny rails and features a cross-slot keyway that offers excellent recoil protection. Our Ultralight Scope Mounts free you from unnecessary bulk providing one of the lightest mounts in the industry.