Fully-machined hardened steel mount with three-point mounting, provides a stable, secure base for mounting large objective scopes. Easily clamps to the charger guide dovetail and receiver mount lug without modifications to rifle. Heavy, forward locking screw gives rock solid stability at the receiver ring. Sight channel allows back-up use of iron sights without removing scope. Mfg: Smith Enterprise SPECS: 4140 steel, black, nitride finish. Hardened to Rc 60-62. 5.38" (13.6cm) long. 1.875" (4.7cm) high. Weighs 10.9 oz (310 g).