Finish: Black Hardcoat Anodize – Caliber: 5.56 Nato – Barrel: Diamondback Barrels 5.56 16 Medium 4150 CrMov Black Nitride 1:8 RH – Gas System: Carbine-Length – BCG: Shot-Peened Magnetic Particle Inspected Mil Spec 8620 Carrier – Upper: A3 Flattop Forged 7075 T-6 Aluminum T-Marked – Lower: 7075 T-6 Aluminum (DB-15 Carbon Lower) – Handguard: 10 Free Float Quad Rail – Grip: A2 Style Black Polymer – Stock/Brace: 6-Position ATI Mil-Spec Buttstock – Magazine: Metal Mag 30 Round – Sights: N/A – Muzzle Device: A2 Flash Hider (1/2 x 28) – Trigger: Mil-Spec – Weight: 6.4 lbs – Overall Length: (Stock Collapsed 32 3/4) (Stock Expanded 36)