The Diamondback DB15 Carbon Series .300 Blackout rifle in Burnt Bronze (Diamondback part no. DB1718B042) is a 16-inch AR chambered in .300 AAC Blackout and finished in Burnt Bronze Cerakote. It uses a heavy-profile 1:8 twist barrel with a pistol-length direct impingement gas system, a 15-inch M-LOK AV-Rail handguard with anti-slip texture pads and a Magpul MOE-PR stock. The receivers are forged 7075-T6 aluminum, and a 30-round Magpul Gen M3 PMAG comes with the rifle. The .300 Blackout chambering makes it a natural fit for shooters who want a short, handy rifle for the range and the field.

Key Specifications

• The chambering is .300 AAC Blackout, a cartridge designed for short-barreled AR-15 platforms.
• The barrel is 16 inches with a 1:8 right-hand twist, heavy profile, 4150 CrMoV steel with a black nitride finish.
• The finish is Burnt Bronze Cerakote, applied over the aluminum receivers.
• The gas system is pistol-length direct impingement, which suits the .300 Blackout cartridge in a 16-inch barrel.
• The handguard is a 15-inch M-LOK AV-Rail with anti-slip texture pads for a better support-hand grip.
• The upper is a forged 7075-T6 aluminum A3 flat-top, T-marked, for optic mounting.
• The lower is forged 7075-T6 aluminum, Diamondback’s DB15 Carbon lower.
• The stock is a Magpul MOE-PR, which adjusts for length of pull.
• A Magpul Gen M3 PMAG with a 30-round capacity is included.
• The muzzle device is an A2 flash hider threaded 5/8×24.

Frequently Asked Questions

What gas system does this .300 Blackout rifle use? It uses a pistol-length direct impingement gas system with a 16-inch heavy-profile barrel.

What is the muzzle thread? The A2 flash hider threads on at 5/8×24.

Does it come with a magazine and sights? It comes with a 30-round Magpul Gen M3 PMAG. Diamondback lists the sights as none, so you add your own optic or backup sights.

Buy the Diamondback DB15 Carbon Series .300 Blackout in Burnt Bronze

For .300 Blackout shooters, a 16-inch rifle with an M-LOK handguard and a 5/8×24 muzzle is a flexible starting point. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles while you are here.