Diamondback Firearms DB15 5.56 NATO 16" 31-Round Rifle

The Diamondback Firearms DB15 5.56 NATO 16" 31-Round Rifle is a purpose-built modern sporting rifle engineered for tactical deployment, home defense, and precision shooting disciplines. Chambered in 5.56 NATO—the NATO-standardized equivalent of .223 Remington—this platform delivers reliable, proven ballistics that meet military and law enforcement specifications. At 8.31 lbs with a compact 39.5-inch overall length, the DB15 balances controllability with maneuverability, making it ideal for operators who demand a rifle that performs in confined spaces without sacrificing firepower or accuracy. The 31-round capacity ensures extended engagement capability and minimizes reload frequency during critical situations.

Built on the proven direct impingement operating system, the DB15 delivers consistent cycling and minimal maintenance compared to alternatives. The 16-inch barrel provides optimal muzzle velocity for 5.56 NATO duty rounds while maintaining the short profile necessary for tactical applications—this length sits at the performance sweet spot between velocity (typically 2,800–3,100 fps depending on ammunition) and maneuverability. Diamondback's manufacturing standards ensure tight tolerances and reliable function across commercial and mil-spec ammunition, a critical requirement for operators who cannot afford malfunctions. The integrated platform accepts standard AR-15 pattern optics, rail systems, and accessories, enabling users to customize the rifle to mission-specific requirements without tool changes or gunsmithing.

The DB15 serves law enforcement, military personnel, and civilian tactical shooters who prioritize reliability and ergonomic control. Its 5.56 NATO chambering ensures compatibility with both training and duty-grade ammunition widely available through military and commercial supply chains. The 31-round magazine capacity exceeds standard 20 and 30-round configurations, providing extended operational range in high-volume scenarios. Users benefit from the modular AR-15 ecosystem—rail adapters, backup sights, suppressors with appropriate 1/2x28 threading, and tactical lighting integrate seamlessly. Whether deployed for home defense, competitive tactical shooting, or professional applications, this rifle delivers the accuracy and reliability expected from a Diamondback Firearms platform.