LaRue Tactical LT152 QD Aimpoint Comp M2 RAS II 30mm Rifle Scope Mount 1/2" shorter than the standard Comp M2 mount 30mm ring and hard-locks to any rail Positions the centerline of the optic 1.20" above the top of the rail Precision-machined out of bar stock aluminum Comes complete with QD adjustment wrench, spare ring screw, and instructions