Barrel: The dimpled 18" Nitride finish barrel 308 WIN 1/10 twist mid-length gas system upper is paired with a DPMS Panther Arms 15" M-Lok free-float rail low profile adjustable click detent 3 position gas block and an A2-style muzzle device. The gas system is enhanced with a nitrided gas tube in order to better resist high heat and corrosion.Upper: Precision machined from forged 7075-T6 aluminum then Black anodize hard coated to MIL-8625 Type 3 class 2. With enhanced dual retention anti-slip and anti-rotating handguards.Bolt Carrier Group: Tool craft 9310 steel bolt assembly with extra strength extractor springs that is nitride for increased durability. 8620 carrier nitride treated with a nitride treated gas key properly staked with grade 8 fasteners. A 7075 T6 aluminum charging handle is also included.Lower: Precision machined from forged 7075-T6 aluminum these lowers are then Black anodize hardcoated to MIL-8625 Type 3 class 2. With an Panther Polished Trigger (PPT) a black B5 Systems adjustable Bravo Stock and a Panter Custom Over-Molded Grip.Barrel Length: 18"Barrel Material: Nitride coated 4150 Chrome Moly Vanadium SteelBarrel Profile: A2 StyleChamber: .308 WINTwist Rate: 1 in 10"Extension: M4Gas System: Mid-LengthGas Block Type: Low-profile 3 position click switch adjustable gas blockUpper Receiver: Forged 7075 T6 AluminumReceiver Style: PA10 Flat top with Feed RampsReceiver Finish: Hardcoat AnodizedForward Assist: YesDust Cover: YesHandguard Type: DPMS 15" M-Lok Free Float Rail with Anti-slip and anti-rotation featuresBolt Carrier Group: Yes Toolcraft PA10 BCG with extra power extractor springStaked Gas Key: YesLower Receiver: Forged 7075 T6 AluminumReceiver Finish: Hardcoat AnodizedFire Control Group: Panther Polished Trigger (PPT)Buffer Tube: 7075 T6 AluminumAdjustment: 6-position telescoping stockStock: B5 Systems Bravo Stock BlackGrip: Panther Custom Overmolded Grip Magazine: 20 Round Magpul PMAG (1 included)