Description
Engineered for those who demand precision in compact form, the Diamondback DBX57 CFB merges the ballistic advantages of 5.7x28mm with a rugged pistol design built to withstand harsh environments. Its dual gas piston operating system ensures smooth cycling and dependable function, whether navigating urban settings or the arid landscapes around Phoenix.
This pistol features a black hard coat anodized 7075 T6 aluminum frame and receiver, providing lightweight durability without compromising strength. The M-LOK compatible handguard allows for effortless accessory mounting, while the optic-ready flat top offers immediate sighting system integration. A standard AR-15 Mil-Spec trigger delivers consistent pull, and the 1/2×28 RH threaded barrel accommodates various muzzle devices for enhanced performance.
- Manufacturer: Diamondback Firearms
- Model: DBX57 CFB
- Caliber: 5.7x28mm
- Barrel Length: 8″
- Twist Rate: 1:9
- Overall Length: 15.25″
- Finish: Black Anodized
- Grips: Black Magpul MOE K
- Magazine Capacity: 20-Rounds (FN Five-SeveN Compatible)
Included with the firearm are a 20-round magazine, cable lock, and owner’s manual, ensuring you have everything needed for immediate use. The stainless steel barrel and DBX muzzle device contribute to accuracy and recoil management, making this pistol a practical choice for everyday carry in Arizona’s demanding conditions. Tucson Arms provides straightforward shipping to your local FFL for all Arizona residents, ensuring secure transfer and compliance.





Vanessa S. –
The DBX57 handled well at the range, and I liked how lightweight it felt. Accuracy was solid with Federal ammo, but it had two failures to feed with some cheaper stuff. The trigger pull was a bit heavier than I expected too. Still, it’s a fun shooter once you find what it likes.
Samantha T. (verified owner) –
Used it at the Scottsdale Gun Club range last month. The pistol shot accurately and felt balanced. My only complaint is the price of 5.7x28mm ammunition—it adds up fast during extended sessions. The M-LOK system worked well for my grip, though. Would recommend if budget isn’t a concern.
Nate L. –
Brought this to the field for some practical shooting drills. The 5.7x28mm cartridge performed flawlessly, with minimal recoil that helped me stay on target. I mounted a vertical grip on the M-LOK handguard, which improved handling. After 300 rounds, it was still running smoothly. Great purchase from an Arizona shop.
Diego M. (verified owner) –
Took this out to the desert near Tucson last weekend. The 5.7x28mm round was surprisingly flat-shooting at 100 yards, and the M-LOK handguard made mounting my light easy. Recoil was minimal, which helped with quick follow-up shots. I put about 200 rounds through it without a single malfunction. Definitely my new favorite pistol for plinking.
Ryan P. (verified owner) –
First range trip with this was eye-opening. At 25 yards, I was consistently hitting 2-inch groups with the 5.7x28mm. The ergonomics fit my hands perfectly, and the controls were intuitive. Recoil management was excellent, making rapid fire easy to control. Tucson Arms had it ready when promised.
Adam W. (verified owner) –
The fit and finish on this pistol are top-notch. I tested it with various 5.7x28mm loads, and it ate everything without issue. Accuracy was impressive even at longer distances. The M-LOK slots allowed me to customize it exactly how I wanted. Tucson Arms provided good service too.