Warne 1-Piece MSR cantilever mounts are constructed from 6061 T6 aluminum for a lightweight and rigid foundation. Steel threaded inserts ensure steel on steel contact between all threaded interfaces and MSR Ideal Height helps the shooter maintain a proper cheek weld and shooting position with any optic on flat top guns The X-SKEL Mount gives additional cantilever while reducing weight with its skeletonized design offering Return-to-Zero scope mount capability that Warne is known for.Lightweight skeletonized aluminum body and caps to reduce overall weight without sacrificing reliability#8 Torx style fasteners with steel threaded inserts to prevent strippingExtended design provides over 2 inches of forward cantilever for additional eye reliefPlaces the optic at the IDEAL HEIGHT for MSR and similar style platformsDual 1/2" tactical nut attachments 65 in/lb of torque recommended