Diamondback DB15 - 5.56x45mm NATO SEMI-AUTOMATIC RIFLE The Diamondback DB15 is a semi-automatic rifle chambered in 5.56x45mm NATO, designed to deliver reliable AR-pattern performance in a practical, user-friendly platform. Built for range use, training, and general-purpose shooting, the DB15 combines classic AR ergonomics with dependable function in a versatile modern sporting rifle. Constructed with a forged aluminum upper and lower receiver and a cold-finished steel barrel, the DB15 features a direct impingement gas system, standard AR-style controls, and a flat-top Picatinny rail for optics and accessories. The rifle incorporates an adjustable stock for personalized length of pull, ergonomic pistol grip, and M-LOK or accessory-ready handguard depending on configuration. Its balanced design and familiar layout make it easy to operate for shooters of all experience levels. Engineered for practical accuracy, consistent cycling, and everyday reliability, the DB15 emphasizes straightforward controls, durable construction, and parts compatibility with the broad AR-15 ecosystem. Its 5.56 NATO chambering, modular platform, and robust build make it a solid choice for range sessions, training, and defensive applications. Specifications Model: Diamondback DB15 Caliber: 5.56x45mm NATO / .223 Remington Action: Semi-automatic, direct impingement Barrel Length: Approx. 16 inches Overall Length: Approx. 32-36 inches (adjustable stock) Receiver Material: Forged aluminum Gas System: Carbine-length Stock: Adjustable Rail: Picatinny upper Capacity: 30+1 rounds (standard; magazine-dependent) Weight: Approx. 6.5-7.5 lbs (unloaded) The Diamondback DB15 in 5.56x45mm NATO offers reliable AR-style performance, familiar controls, and practical defensive and sporting capability in a durable, everyday-ready semi-automatic rifle platform.