This DB15 Pistol features a pistol-length, heavy, 4150 ChromeMoly barrel, pistol-length gas system, and a shot-peened Mil-Spec 8620 bolt carrier. It has 7075-T6 aluminum receivers, 6" M-Lok handguard, Magpul MOE grip, and a SBA3 brace. Firearm Specifications Manufacturer: Diamondback Model: DB15 Caliber: 5.56mm NATO Barrel Length: 7 in Overall Length: 25.50 in Twist Rate: 1 / 2"x28 Finish: Black Nitride Sights: None Grips/Stock: SB Tactical SBA3 Brace Magazine Capacity: 30