The Hostile Engagement Rings are fused together and created a beefy one-piece Hostile Engagement Mount. Made from 7075-T6 aluminum and finished in matte black hardcoat, the Hostile Engagement Mount extends the center of the forward ring 2 beyond the edge of the 1913 Picatinny mounting surface. This configuration is perfect for LPVOs with generous eye relief, like Tomahawk and Arrowhead. Low profile T25 Torx bolts provide more clamping power than thumb nuts, while integrated recoil lugs ensure everything stays locked down. Built-in RMR footprint mounts at 45 angles are threaded 3.5 x 0.6 for installing an offset back up dot sight like Kingslayer, Liberty or Justice.