DIAMONDBACK FIREARMS DB15 CARBON SERIES 5.56 NATO SEMI-AUTO RIFLE The Carbon Series DB15 is Diamondback's entry level line, offering an outstanding value in an AR-15. The Carbon Series provides all of the reliability and basic features that you need from a rifle and nothing that you don't. Outfitted with Magpul furniture, a DB Carbon lower, and an M-LOK compatible free float handguard, the Carbon Series DB15 is ready for anything at a price you can afford. SPECS Caliber: 5.56 NATO Barrel: 16 in, 1:8 RH, Medium, 4150 CrMov, Black Nitride Gas System: Mid-Length, Direct Impingement BCG: Shot-Peened, Magnetic Particle Inspect Mfg: Diamondback