Diamondback Firearms DB15 Carbon .300 Blackout Pistol, 10″ Barrel

Product Description

The Diamondback Firearms DB15 Carbon is a semi-automatic .300 Blackout AR pistol with a 10″ threaded barrel. It runs on a pistol length gas system and the direct gas-impingement design Diamondback calls U.S. military-proven. The finish is Cerakote in Smoked Bronze, and the frame is aluminum.

What stands out

The handguard is M-LOK, so you can mount accessories only where you need them. At the rear sits an SB Tactical SBA3 pistol brace, and a Magpul MOE grip comes on the front end of the pistol grip area for a familiar hold. Diamondback says it machines its components in its own CNC facility. One 30-round magazine is included.

This pistol suits shooters who want a short, handy .300 Blackout without giving up the AR layout. The threaded muzzle is ready for a compatible muzzle device or suppressor. That makes it a natural fit for anyone planning a quiet or compact build.

For gear, think M-LOK lights, a vertical grip or a sling mount, plus a red dot or a low-power optic on the top rail. Extra 30-round magazines are worth adding for range days.

Diamondback Firearms DB15 Carbon .300 Blackout Pistol, 10" Barrel Specifications

What’s in the Box

1 Magazine (per the manufacturer’s listing).

Fits and Pairs With

• Barnes Precision Match, 300 Blackout, 220 Grain, 20 Round Box
• Corbon Ammo Deep Penetrating X bullet, Subsonic, 300 Blackout, 200 Grain, Expanding Solid Copper Hollow Point
• DoubleTap Ammunition Colt Defense, 300 Blackout, 125Gr, Solid Copper Hollow Point, 20 Round Box
• Federal American Eagle, 300 Blackout, 150 Grain, 20 Round Box
• Hornady BLACK, 300 AAC Blackout, 110 Grain, 20 Round Box
• Frontier Cartridge Lake City, 300 Blackout, 125 Grain, 20 Round Box

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: What caliber is the Diamondback DB15 Carbon pistol?

A: It is chambered in .300 Blackout. It is a semi-automatic AR pistol with a 10" barrel.

Q: How many rounds does the DB15 Carbon hold?

A: 30 rounds. One magazine is included.

Q: Does the DB15 Carbon have a threaded barrel?

A: Yes. The 10" barrel is threaded at the muzzle for compatible muzzle devices or suppressors.

Q: What brace and handguard does the DB15 Carbon use?

A: It uses an SB Tactical SBA3 pistol brace and an M-LOK handguard. The grip is a Magpul MOE.

Q: Is the Diamondback DB15 Carbon any good?

A: It has a solid feature set for the category. You get a 10" threaded barrel, a pistol length gas system, a Cerakote finish, an M-LOK handguard and an SBA3 brace. Diamondback also says its parts are machined in its own CNC facility.

Warranty and Manufacturer

Covered by the Diamondback Firearms factory warranty; warranty terms come from Diamondback Firearms.

Additional information