Diamondback DBX57 Pistol | 5.7x28mm | 8″ | 20rd

The Diamondback DBX57 is a compact semi-automatic pistol built around a monolithic upper and chambered in 5.7x28mm. It pairs an 8″ stainless steel barrel with a 6061 M-LOK handguard and accepts FN Five-seveN-compatible 20-round magazines for a slim, lightweight package suited to range use and competitive practice. For sighting, a compact red-dot such as the Vortex Venom (a capable optic under $1,000) is a practical match for the DBX57’s top Picatinny rail and intended close-to-mid range role.

Product Specifications

• The finish is Black Hardcoat Anodize.
• The caliber is 5.7 x 28 mm.
• The barrel is an 8 inch Diamondback stainless steel barrel with a 1:9″ twist rate.
• The barrel muzzle is threaded to 1/2×28 RH.
• The action is a Semi-Auto locked-breech dual gas piston system with four adjustments.
• The upper is a monolithic forged 7075 T-6 aluminum assembly.
• The lower is 7075 T-6 aluminum.
• The handguard is 6061 aluminum and is M-LOK compatible.
• The charging handle is reversible.
• The grip is a Magpul MOE K style pistol grip.
• The magazine supplied is a 20-round Promag (FN Five-seveN compatible).
• Sights are not included.
• The muzzle device included is a Diamondback flash hider threaded 1/2×28.
• The trigger is a standard AR15 mil-spec trigger.
• The overall length is 15.25 inches and the unloaded weight is approximately 3 lbs.
• The UPC is 810035752696.

The DBX57 emphasizes a narrow control profile and lightweight construction while retaining AR-pattern ergonomics and modularity. Its monolithic upper and adjustable piston system make it a straightforward option for shooters who want a slim, range-oriented pistol that accepts readily available FN Five-seveN-format magazines. The M-LOK handguard and Picatinny rail support common accessories and optics for practical range use and competitive training.

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