The Diamondback Carbon DB15 (Diamondback part no. DB1718B042) is a .300 AAC Blackout AR-15 finished in a distinctive Burnt Bronze Cerakote for shooters who want subsonic-capable performance with a look that stands out. Diamondback Firearms builds this rifle on a forged 7075-T6 aluminum upper and a carbon-fiber reinforced polymer DB15 lower, keeping the overall package light without sacrificing strength. The 16-inch heavy 4150 chrome moly vanadium barrel wears a black nitride finish for durability, and the pistol-length gas system smooths out cycling. Magpul furniture, a free-float M-Lok handguard, and an A2 flash hider round out a rifle built for target shooting, hunting, and home defense alike.

Key Specifications

• Chambered in .300 AAC Blackout, suited to both supersonic and subsonic loads.
• Barrel length is 16 inches, with a heavy contour in 4150 chrome moly vanadium steel.
• The barrel carries a black nitride finish for corrosion resistance.
• Rate of twist is 1-in-8, stabilizing heavier .300 Blackout bullet weights.
• The gas system is pistol-length direct impingement for smooth, reliable cycling.
• Upper and lower receivers combine a forged 7075-T6 aluminum upper with a carbon-reinforced DB15 lower.
• Furniture includes a Magpul DT-PR adjustable stock and a Magpul MOE grip.
• A 15-inch M-Lok free-float handguard with anti-slip texture panels covers the barrel.
• The finish is a Burnt Bronze Cerakote over the metal components.
• Ships with one Gen 3 PMAG chambered for .300 Blackout.

Frequently Asked Questions

Can this rifle run subsonic .300 Blackout ammunition? Yes, the 1-in-8 twist and chambering support both supersonic and subsonic .300 Blackout loads.

What magazine does it ship with? One Gen 3 PMAG configured for .300 Blackout.

What is the lower receiver made from? A carbon-fiber reinforced polymer DB15 lower.

Buy the Diamondback Carbon DB15 .300 Blackout Rifle, 16-inch Barrel, Burnt Bronze Cerakote

This Burnt Bronze DB15 stands out in our AR rifles lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.