Hi-Point® Firearms 5.56 Rifle Specifications – Barrel length: 16 – Weight Unloaded: 6.25 lbs. – Hand Guard: 15 M-Lok – Barrel Twist: 1:8 – Gas System: Carbine – Stock: M4 with QD – Threaded 1/2 x 28 barrel standard – All Hi-Point® Firearms HP-15s come with Mil-Spec Upper and Lowers – Barrel 4150 Chrom Moly Vanadium – Lower Receiver Forged 7075 T6 – Upper Receier Forged 7075 T6 – Muzzle Device: A2 BIRDCAGE – A2 Pistol Grip – Mil-Spec Bolt Release – Mil-Spec Magazine Release – Mil-Spec Charging Handle – Carbine Buffer – Manual Safety 90 Degree – 30 Round Magazine – Cable Gun Lock – Breach Flag