Diamondback DB15 .300 Blackout 16″ M-LOK 30rd

About this product

The Diamondback DB15 in .300 AAC Blackout is a purpose-built AR-style rifle that balances short-range performance with accessory compatibility. It features a 16″ heavy 4150 chrome-moly barrel with a black nitride finish and a pistol-length gas system for reliable function with common .300 Blackout loads. Built on forged 7075-T6 aluminum receivers in Diamondback’s Black Gold finish, the platform includes a 15″ M-LOK handguard and Magpul furniture for practical ergonomics and modularity. The rifle ships with a 30-round Gen 3 .300 BO PMAG for extended capacity during range and training sessions.

Key Specifications

• The caliber is .300 AAC Blackout.
• The barrel measures 16″ and is described as a heavy 4150 CrMoV with a black nitride finish.
• The rifle uses a pistol-length gas system for its gas operation.
• The bolt carrier group is a shot-peened Mil-Spec 8620 carrier.
• The action type is Semi-Auto.
• The listed unloaded weight is 6.80 lbs.
• The magazine capacity is 30 + 1 and it ships with one 30-round PMAG.
• The handguard is a 15″ M-LOK (V Rail) with anti-slip texture pads.
• The muzzle device is a Diamondback CNC DBSB-IV flash hider threaded 5/8×24.
• The stock and grip are Magpul CTR stock and Magpul MOE K2 grip, respectively.

Compact, familiar, and designed to accept a wide range of accessories, the DB15 .300 Blackout suits shooters assembling a short-range precision or tactical-minded carbine. Its combination of a nitride-treated heavy barrel, M-LOK handguard and Magpul ergonomics provides a durable, adaptable platform for range work, training, and practical use in environments where a versatile, AR-style rifle is preferred.

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