The Diamondback DB15 Combo DB1721K001 is a versatile AR-platform rifle package designed to deliver dependable performance, modular capability, and exceptional value for shooters seeking the flexibility of both 5.56 NATO and .300 Blackout calibers in a single system. This combo includes two complete 16-inch upper assemblies, allowing users to quickly adapt the rifle for tactical applications, hunting, range training, or home defense.

Built around a durable black carbon-style receiver set, the DB15 features a lightweight yet rugged construction engineered for reliable operation and long-term durability. Both uppers are equipped with precision 16-inch barrels and 12-inch free-float M-LOK handguards, providing improved accuracy, enhanced cooling, and extensive customization options for optics, lights, grips, and accessories.

The rifle is outfitted with premium Magpul furniture, including an adjustable Magpul carbine stock and ergonomic Magpul pistol grip for enhanced comfort, weapon control, and adaptable fit. A full-length Picatinny top rail allows seamless mounting of optics and accessories, while the threaded barrel design supports suppressor and muzzle device compatibility.

With a 30+1 capacity and the capability to switch between the versatility of 5.56 NATO and the hard-hitting performance of .300 Blackout, the Diamondback DB15 Combo offers shooters a highly adaptable and modern sporting rifle platform built for reliability, performance, and customization.