Diamondback DB15 AR Rifle — 5.56 NATO, 16″ Barrel

About this product

The Diamondback DB15 Diamond Series is a purpose-built AR-style rifle chambered for .223 Rem/5.56 NATO and configured for general-purpose modern sporting use. It employs a 16″ mid-length 4150 Chromoly barrel with a black nitride finish, a mid-length gas system with a pinned gas block, and a shot-peened Mil-Spec 8620 bolt carrier. The rifle pairs forged 7075 T-6 aluminum upper and lower receivers with a 15″ M-LOK anti-rotation handguard and Magpul furniture for familiar ergonomics and modularity. Standard equipment includes a CMC 3.5 lb single-stage drop-in trigger, a Diamondback CNC muzzle brake, and a Gen 2 30-round PMAG.

Key Specifications

• Chambered for .223 REM/5.56 NATO to match common commercial and military-spec loads.
• The barrel measures 16 inches and is 4150 Chrome-Moly Vanadium with a black nitride finish for durability.
• The barrel twist rate is 1:8 RH for stability with a broad range of bullet weights.
• Equipped with a mid-length gas system and a pinned gas block for reliable cycling and reduced recoil impulse.
• Built on forged 7075 T-6 aluminum upper and lower receivers for strength and longevity.
• Features a 15″ M-LOK Anti-Rotation (S-Rail) handguard to support accessories and modular setups.
• Includes a Magpul ACS-L stock and a MOE K2+ grip for ergonomic control and adjustability.
• Comes with a CMC 3.5 lb single-stage drop-in trigger to improve break consistency.
• Ships with a 30 + 1 capacity via a Gen 2 PMAG 30-round magazine.
• Weighs approximately 6.95 lbs and measures 34″ (collapsed) to 37.25″ (extended) overall for a balanced profile.

Combining a durable 4150 Chromoly barrel and proven componentry with user-focused furniture, the DB15 Diamond Series offers a dependable, configurable platform for range work, training, and general-purpose field use. Its mix of forged receivers, a mid-length gas system, and familiar Magpul ergonomics provide a practical balance of performance and handling for shooters who value reliable function and straightforward features.

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