Diamondback Firearms DB15 rifle is made entirely in the USA. It uses a gas-impingement system and high quality CNC machined components. The DB15 model's features a 4140 chrome moly barrel, forged 7075 T6 aluminum lower and upper receiver, no sights, and a carbine length gas system. This Elite model has a 18" black melonite barrel with a muzzle brake, an Adaptive Tactical EX Performance stock, Hexmag Suregrip pistol grip, 15" M-Lok handguard, and a flat dark earth cerakote receiver finish.