The Diamondback Firearms DB15 is a 5.56 NATO semi-automatic rifle built around a familiar AR-style operating system. This configuration combines a 16-inch threaded barrel with a B5 Systems adjustable stock, an M-LOK handguard, and a MultiCam finish. The flat-top receiver provides a practical foundation for adding an optic, while the 30-round magazine supports extended range sessions and recreational use.

Key features

• 5.56 NATO chambering supports widely available commercial and defensive ammunition
• 16-inch threaded barrel balances handling, velocity, and accessory compatibility
• M-LOK handguard provides flexible mounting points for lights, grips, and other accessories
• B5 Systems adjustable stock allows the length of pull to be tailored to the shooter
• Flat-top receiver is optic ready for a customized sighting setup
• Includes one 30-round magazine

The DB15 B5 Systems configuration offers a versatile, accessory-ready 5.56 NATO rifle for range use and practical shooting applications.