SLR 5 inch SOLO Intrepid 5.56 Handguard Black. 3 inch Inner Diameter. Mil-Spec hardcoat anodize. 7075 barrel nut w/ hardcoat anodize. Free floating design. 2 QD swivel sockets. Dual wedge mounting system. Billet anti-rotation insert. Anti-slip design. Barrel nut wrench INCLUDED. Continuous top and bottom rail design. Mil-Spec 1913 mounting rails. Included Accessories: Barrel Nut Barrel Nut Wrench Hardware Specifications for SLR SOLO Intrepid 5.56 Handguard: Manufacturer: SLR Color: Black Finish: Melonite Fabric/Material: Alluminum Alloy Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gun Rail: Picatinny Condition: New Included Accessories: Anti-rotation Insert Wedge Set Barrel Nut Mount Type: Picatinny Quantity: 1 Features of SLR SOLO Intrepid 5.56 Handguard: 1.3 inch Inner Diameter. Mil-Spec hardcoat anodize. 7075 barrel nut w/ hardcoat anodize. Free floating design. 2 QD swivel sockets. Dual wedge mounting system. Billet anti-rotation insert. Anti-slip design. Barrel nut wrench INCLUDED. Continuous top and bottom rail design. Mil-Spec 1913 mounting rails. Included Accessories: Barrel Nut Barrel Nut Wrench Hardware Package Contents: SLR SOLO Intrepid 5.56 Handguard SLR SOLO5-INT: 5 inch SOLO Intrepid 5.56 Handguard Black