This Presma 7" M-LOK handguard with a shark forend and integrated hand stop fits AR-15 upper receivers with .223/5.56 barrels. It is CNC machined from 6061-T6 aluminum and black anodized, and weighs only 6.78 oz with the barrel nut. The shark-style forend and integrated hand stop give your support hand a positive index point on a short build. Installation is quick and secure: two screws hold the handguard, and no timing shims are required. Features: 7" length with M-LOK slots Shark forend with integrated hand stop Sling swivel attachment holes on left and right CNC machined 6061-T6 aluminum, black anodized 6.78 oz with barrel nut Two-screw install, no timing shims required Machined and anodized in the USA Includes steel barrel nut, two screws and hex wrench Fitment: AR-15 upper receiver, .223/5.56. The barrel nut requires a regular crow's-foot style wrench or wrench head, 30mm. Confirm your gas block fits under a 7" handguard before installing.