Diamondback Firearms DB15 5.56 NATO Semi-Auto Rifle 16″ Barrel M-LOK 15″ Handguard Black

The Diamondback Firearms DB15 is a no-nonsense, mil-spec-inspired AR-15 chambered in .223 Rem/5.56 NATO, built for range training, home defense, and general-purpose use. With a 16-inch barrel and a 15-inch M-LOK handguard, it delivers a full-length platform that balances maneuverability with accuracy. It ships optics-ready with no sights installed, giving shooters a clean slate to mount their preferred optic or iron sight system.

Key Specifications

• The DB15 is chambered in .223 Rem / 5.56 NATO for versatile, widely available ammunition compatibility.
• The semi-automatic rifle features a 16-inch barrel for reliable velocity and legal rifle classification.
• A 1-in-8 inch rate of twist stabilizes a broad range of bullet weights from 55 to 77 grains.
• The handguard is a 15-inch M-LOK design, providing ample real estate for accessories and a free-float advantage.
• The rifle ships with one Magpul Gen 2 PMAG 30-round magazine included.
• The platform is finished in black with a standard AR profile.
• No sights are included, making it optics-ready for your preferred red dot, magnified optic, or BUIS setup.
• The action is semi-automatic, ATF-classified as a rifle.

The DB15 from Diamondback Firearms is the kind of AR that gets out of its own way — a clean, capable platform that lets you build exactly the rifle you want. Whether you’re ringing steel at the range or setting it up as a go-to home defense carbine, the free-float M-LOK handguard, 1-in-8 twist barrel, and included Gen 2 PMAG give you a serious foundation without unnecessary extras driving up cost. Add your optic, configure your furniture, and put rounds downrange with confidence.