Diamondback DB15 5.56 NATO 16in M-LOK FDE

The Diamondback DB15 is a purpose-built semi-automatic AR-pattern rifle chambered for .223 Rem / 5.56 NATO. It pairs a 16-inch, medium-profile 4150 Chromoly barrel with a mid-length gas system and a pinned gas block for reliable operation. The rifle uses forged 7075-T6 aluminum receivers, a 15-inch M-LOK anti-rotation handguard, Magpul MOE-K2+ grip and Magpul ACS-L adjustable stock. It ships with a 30-round Gen2 PMAG and a threaded muzzle device with 1/2×28 tpi.

Key Specifications

• Chambering is .223 Rem / 5.56 NATO for common service calibers.
• The barrel measures 16 inches and is a medium-profile 4150 ChromeMoly steel with a Black Nitride finish.
• Gas operation uses a mid-length gas system with a pinned gas block.
• The upper and lower are forged 7075 T-6 aluminum receivers.
• The handguard is a 15-inch M-LOK anti-rotation (S-rail) for accessory mounting.
• The stock is a Magpul ACS-L adjustable unit paired with a Magpul MOE-K2+ grip.
• The trigger is a CMC 3.5 lb single-stage drop-in unit.
• Magazine capacity is 30 + 1 and includes one Gen2 PMAG 30-round magazine.
• The rifle weight is approximately 6.95 lbs and overall length ranges from 34 to 37.25 inches depending on stock position.
• The muzzle is threaded 1/2×28 tpi and fitted with a Diamondback CNC muzzle brake.

This DB15 balances practical ergonomics and service-oriented features for shooters who need a dependable AR-pattern rifle for range use, training, or general-purpose applications. Its combination of a mid-length gas system, hardened bore finishing, and quality component selection provides predictable function and straightforward maintenance. The Magpul furniture and M-LOK handguard give a familiar, configurable platform for mounting optics and accessories while keeping weight and handling tuned for everyday carry and field use.

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