The Diamondback 9mm features a 7 heavy, 4150 CrMov, Black Nitride barrel; pistol length gas system; shot-peened, magnetic particle inspected Mil-Spec 8620 Carrier BCG; A3 Flattop Forged 7075 T-6 Aluminum upper; Forged 7075 T-6 Aluminum (Diamondback Diamond Lower) w/enhanced Skeletonized Trigger Guard lower; Diamondback 9 M-LOK Anti-Rotation (S-Rail) handguard; KAK Standard Size Flash Can muzzle; standard trigger. Includes Gen 2 PMAG 30rd. *No brace.