Phase 5 Weapon Systems Inc Hexone Pistol Buffer Tube Black HEXONE. These HexOne Buffer Tubes feature a new Hex design and include machined scallops that add style to this heavy-duty and extremely rugged component. The HexOne undergoes an additional surface tumbling process that toughens the outer edges and surfaces yet leaves everything smooth and snag free. Simple sleek tough as hell and perfect for 5.56NATO/.223 or 300blk. Specifications for Phase 5 Weapon Systems Inc Hexone Pistol Buffer Tube: Manufacturer: Phase 5 Weapon Systems Inc Color: Black Finish: Plain Fabric/Material: 7075-T7 Billet Aluminum Length: 7.4 in Diameter: 1.4 in Condition: New Buffer Tube Size: Mil-Spec Weight: 11.5 oz Features of Phase 5 Weapon Systems Inc Hexone Pistol Buffer Tube Diameter: Edge to Edge OD: 1.4in. Flat to Flat OD: 1.25in. Fits Mil-Spec and Billet lower receivers just like a standard Pistol Buffer Tube CNC-machined 7075 T7 certified made in specialized factories billet aluminum Hexagonal Pistol buffer tube. Machined lower slot and anti-tilt technology built into every tube. Package Contents: Phase 5 Weapon Systems Inc Hexone Pistol Buffer Tube Castle Nut End Plate Carbine Buffer - Standard 3oz Phase 5 Enhanced Buffer Spring Phase 5 Weapon Systems Inc HEXONE: Hexone Pistol Buffer Tube Black