Warne Scope Mounts 20MOA Extended Skeletonized 30mm MSR Mount, Tactical Gray The lr-skel mount offers 20 MOA built-in slope for long range precision Shooting This allows additional elevation adjustment in your optic when Shooting ranges over 600 yards Lr-skel mount is CNC precision Machined from 6061 aluminum and Warne has been able to reduce the weight by over 30% Lr-skel provides an additional inch of forward cantilever