Diamondback Firearms DB15 5.56 NATO Semi-Auto Rifle – 16″ Barrel, 15″ M-LOK, Flat Dark Earth

The Diamondback Firearms DB15 is a solid, purpose-built AR-15 chambered in .223 Rem/5.56 NATO, designed for shooters who demand dependable semi-auto performance straight out of the box. With a 16-inch barrel and a 15-inch M-LOK handguard, this rifle gives you the rail space to configure your setup exactly as you need it—optics, lights, foregrips, and more. The Flat Dark Earth finish gives it a tactical, field-ready aesthetic without the extra weight or cost of premium boutique builds.

Key Specifications

• Chambered in .223 Rem / 5.56 NATO for broad ammunition compatibility.
• The barrel measures 16 inches, striking a practical balance between velocity and maneuverability.
• A 1-in-8 inch rate of twist stabilizes a wide range of projectile weights effectively.
• Features a 15-inch M-LOK handguard for a clean, lightweight platform with extensive accessory mounting options.
• Operates on a semi-automatic action for smooth, reliable cycling.
• Ships with 1 Magpul Gen 2 PMAG 30-round magazine included.
• Capacity is 30+1 rounds for a full combat-ready load.
• Finished in a Flat Dark Earth / Brown color scheme for a professional field appearance.
• Classified as an ATF Type: Rifle, compliant for standard purchase in eligible states.
• Comes optics-ready with no sights, letting you mount your preferred optic or iron sight system.

The DB15 from Diamondback Firearms is a no-nonsense AR platform that delivers where it counts—reliable cycling, a versatile M-LOK handguard, and a well-matched 1-in-8 twist barrel ready to handle everything from 55-grain plinking rounds to heavier defensive loads. Whether you’re building a dedicated range rifle or a capable home-defense carbine, this FDE DB15 gives you a quality foundation with room to grow. Add your preferred optic, flip-up irons, or light, and you’re ready to run.