Lightweight, low-profile, rail clamps to handguard side rail to allow easy off-axis mounting of red dot sights in the 1:00 or 11:00 position. Lets operator transition almost instantly from long-range primary optic to non-magnified CQB sight without breaking cheekweld. Viewing tunnel through the mount helps minimize obstruction of operator's view of area around the target. Plenty of other uses, too; clamps to any MIL-STD 1913 Picatinny rail. Install on underside of handguard to position a laser or weaponlight close to vertical forend grip for easy operation of controls with support hand. Precision machined from 6061-T6 aluminum billet, then mil-spec Type III hardcoat anodized for add Mfg: Daniel Defense SPECS: 6061-T6 aluminum, hardcoat anodized, matte black. 1.2 oz. (34g) weight.