Product Details FeaturesBarrel: Chrome-moly vanadium steel barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a pistol-length gas system. Pencil profile barrel is finished off with a 4” knurled tube free-float handguard, non-F-marked front sight gas block, and an A2 flash hider. Upper: Forged 7075-T6 C7 AR upper is machined to MIL-SPECS and hard coat anodized. Uppers include forward assist, dust cover, and A1 rear sight appature.  Bolt Carrier Group: Shot-peened, mil-spec Carpenter 158 steel bolt. Gas Key Hardened to USGI Specifications, fastened with Grade 8 screws, and Staked Per Mil-Spec. Carrier is 8620 steel M-16 full auto profile and is chrome lined and phosphate coated. Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked “MULTI” for the caliber. Finish is hard-coat anodized. The Mil-spec diameter 7075-T6 buffer tube is hard-coat anodized, has 6 adjustment positions, and is fitted with a DPMS CAR style blade pistol brace. The pistol is finished off with a DPMS Classic A2 grip, and Mil-Spec AR-15 Fire Control Group. DetailsBarrel Length: 7.5”Barrel Material: 4150V Chrome Moly Vanadium SteelBarrel Finish: NitrideBarrel Profile: PencilChamber: 5.56 NATOTwist Rate: 1 in 7”Extension: M4Gas System: Pistol-LengthGas Block Type: .625 non-F-marked FSBUpper Receiver: Forged 7075 T6 AluminumReceiver Style: C7 Carry HandleReceiver Finish: Hardcoat AnodizedForward Assist: YesDust Cover: YesHandguard Style: DPMS 4” Knurled TubeBolt Steel: Carpenter 158, Mag Phosphate coatedBolt Carrier Steel: 8620, Chrome LinedStaked Gas Key: YesLower Receiver: Forged 7075 T6 AluminumReceiver Finish: Hardcoat AnodizedFire Control Group: DPMS Retro AR-15 Mil-SpecBuffer Tube: 7075 T6 Aluminum Mil-Spec TubeAdjustment: 6-position collapsibleBrace: DPMS CAR style Pistol BraceMagazine: (1) DPMS Aluminum 30-Round Magazine