CheyTac USA CT15 M-LOK 5.56mm NATO 16in Black Semi Automatic Modern Sporting Rifle - 30+1 Rounds -This modern sporting rifle is the same quality that you have come to expect form CheyTac. The barrel is 16in and is made from 4150 vanadium steel with a 1:7in twist, SOCOM profile, and nitride coating. Upper/Lower Receivers Are CNC Machined Of 7075-T6 Aluminum, Type III Hard Coat Anodized; Gas System: Low Profile CNC Machined; A2 Muzzle Device; Bolt Carrier Group: M16 Profile; Ambidextrous Safety; Handguard: 13in M Lok, CNC Machined Of 6061-T6 Aluminum; Charging Handle: MIL-STD Charging Handle, 7075-T6 Aluminum, Type III Hard Coat Anodized; B5 Polymer Pistol Grip;