Caliber: 5.56 Nato – Barrel: Diamondback Barrels 5.56 Mid-Length 16 in. Medium 4150 CrMov Black Nitride – Twist: 1:8 RH – Gas System: Mid-Length – BCG: Shot-Peened Magnetic Particle Inspected Mil-Spec 8620 Carrier – Upper: A3 Flattop Forged 7075 T-6 Aluminum – Lower: Forged 7075 T-6 Aluminum [Diamondback Diamond Lower] w/ Enhanced Skeletonized Trigger Guard – Handguard: Diamondback 15 in. M-LOK Anti-Rotation (S-Rail) – Grip: MOE K2+ Grip – Stock/Brace: Magpul ACS-L Stock – Magazine: Gen 2 PMAG 30 Rd – Sights: None – Muzzle Device: Diamondback CNC Muzzle Brake [1/2 x 28] – Trigger: CMC 3.5 lb Single Stage Drop-In – Weight: 6.95 lb. – Length (Collapsed): 34 in. – Length (Extended): 37-1/4 in.