Diamondback Firearms Carbon DB15 .300 Blackout 16" - AR-15 Rifle

The Diamondback Firearms Carbon DB15 .300 Blackout 16" turns your standard AR-15 lower into a hard-hitting .300 Blackout platform that excels suppressed, unsuppressed, and everywhere in between — no new lower, no new mags required.

Built as a semi-automatic AR-15 rifle around .300 Blackout and a direct impingement system, the Diamondback Firearms Carbon DB15 .300 Blackout 16" delivers a proven AR-15 experience from first round to last.

Built for Suppressors: The .300 Blackout cartridge was engineered from the ground up for suppressed use. Subsonic loads run quietly and cycle reliably — the standard for an effective suppressed AR-15.

Supersonic Versatility: Swap to supersonic loads and this platform delivers hard-hitting terminal performance at practical carbine ranges — making it a genuinely dual-purpose rifle for hunting and defense.

Lower Compatibility: Standard AR-15 lower receivers and STANAG magazines work without modification. Only the barrel and BCG are caliber-specific, protecting your existing investment.

Effective Hunting Caliber: Supersonic .300 BLK loads produce enough energy for deer and medium game at moderate ranges, extending the practical role of this AR-15 beyond range and defense use.

• Caliber: .300 Blackout
• Barrel Length: 16"
• Gas System: Direct Impingement
• Handguard: 15" M-Lok Free-Float
• Muzzle Threading: 1/2x28
• Magazine Capacity: 30-Round
• Finish: Burnt Bronze Cerakote
• Origin: Made in the USA

Runs on any mil-spec AR-15 lower with standard STANAG magazines. Only the barrel and bolt carrier group need to be .300 Blackout-specific, making conversion from 5.56 simple.

Burnt Bronze Cerakote over 7075-T6 construction gives this AR-15 rifle solid corrosion resistance and a durable surface that holds up across a wide range of storage and operating conditions.

Purpose-built for suppressed shooting, home defense, and hunting thin-skinned game at moderate range. A natural fit for suppressor owners who want subsonic capability from an AR-15 lower.

Diamondback Firearms builds a full range of AR-15 rifles with an emphasis on reliability and value, offering solid performance at competitive price points. Made in the USA.