The Diamondback DB15 Carbon Series (DB1799K005) is a semi-automatic AR-15 pattern rifle chambered in 5.56 NATO, built around a 16-inch barrel and a 15-inch M-LOK handguard. It ships in a Colorado-compliant configuration with a 10-round magazine and a Magpul MOE stock. The upper and lower receivers are forged 7075-T6 aluminum with a black anodized finish. 
 

Key Specifications 

• Brand: Diamondback Firearms 
• Model: DB15 Carbon Series 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 16" 
• Stock: Magpul MOE 
• Finish: Black 
• Material: 7075-T6 Aluminum 
   

Detailed Features 

• 15-inch M-LOK handguard leaves room for lights, optics accessories, and a foregrip. 
• Factory threaded barrel accepts standard AR muzzle devices. 
• Iron sights are included as a backup for optic use. 
• Magpul MOE carbine stock is collapsible for length-of-pull adjustment. 
• AR-15 pattern manual safety selector uses a familiar layout for anyone used to the platform.

The Diamondback DB15 is generally seen as a solid, budget-friendly entry into the AR-15 category, with owners reporting reliable cycling once the rifle is broken in. Some buyers note the fit and finish sit a step below premium AR builders, but few report function issues at the carbine level.

With a 16-inch barrel and M-LOK handguard, the DB15 Carbon Series handles like a typical carbine-length AR, comfortable for range use and general-purpose shooting. The Magpul MOE stock is a known quantity that most owners are happy to leave alone rather than replace.

Because the DB15 uses standard AR-15 architecture, it accepts the wide aftermarket of grips, optics, and M-LOK accessories without special fitting. Owners moving up from other budget ARs often see the Diamondback as good value, though some plan to upgrade the trigger or handguard down the line.