Diamondback Firearms DB175AK221 DB15 5.56 NATO 16" 31-Round FDE Carbine

The Diamondback Firearms DB175AK221 DB15 5.56 NATO 16" 31-Round FDE Carbine is a modern direct-impingement rifle engineered for patrol, home defense, and tactical training environments where reliability and modularity are non-negotiable. This platform serves law enforcement agencies, military personnel transitioning to civilian use, and serious shooters who demand a rifle built on proven ergonomics and AR-pattern standardization. The FDE (Flat Dark Earth) finish provides professional aesthetics while offering superior corrosion resistance compared to parkerized or bare steel alternatives.

This carbine features a 16-inch barrel optimized for 5.56 NATO/.223 Remington ammunition, balancing muzzle velocity retention with close-quarters maneuverability—critical in tactical operations where barrel length directly impacts ballistic performance and handling. The rifle achieves an unloaded weight of 8.2 lbs, promoting reduced shooter fatigue during extended deployments or training cycles. At 39.2 inches overall length, the DB15 fits standard vehicle storage and confined-space operations while maintaining the ergonomic controls and rail systems characteristic of modern AR-15 architecture, allowing seamless integration of optics, lights, and accessories via Picatinny standards.

This carbine is ideal for shooters seeking a duty-grade platform with aftermarket compatibility across thousands of suppliers—barrel extensions, triggers, handguards, and stocks are drop-in compatible with any AR-15 pattern system. Law enforcement and military end-users benefit from the DB15's inherent parts interchangeability and streamlined maintenance protocols. The 31-round magazine capacity paired with intermediate rifle ballistics makes this carbine suitable for force-on-force training, qualification, and home-defense applications where magazine-fed capacity exceeds standard hunting configurations. Ensure compliance with all applicable local and federal firearms regulations before purchase.