Diamondback Firearms DB15 5.7x28mm 20 inches Brace Pistol

The Diamondback DIA DB1629L001 5.7X28 DBX57 20 with brace is a modern, compact rifle platform purpose-built for shooters seeking a lightweight, maneuverable platform chambered in the 5.7x28mm cartridge. Originally developed for close-quarters work, the 5.7x28mm combines reduced recoil with effective terminal performance in a package that excels in confined spaces—from vehicle ops to tactical room entries. This configuration, featuring a pistol brace, delivers the handling characteristics of a short-barreled rifle while maintaining the legality and portability that operators and civilian tacticians demand.

Built on an aluminum receiver and powered by an 8-inch stainless steel barrel, the DBX57 delivers consistent velocity and accuracy without the blast signature of larger calibers. The SB Tactical folding brace allows rapid deployment and provides a stable firing platform when extended, while the reversible charging handle accommodates both right- and left-handed shooters without modification. The M-LOK compatible handguard grants unlimited mounting flexibility for optics, lights, and support gear, and the included DBX muzzle device manages recoil impulse while maintaining the compact profile. The Magpul MOE K grip rounds out the ergonomic package with a proven, textured interface that functions equally well in gloved or bare-hand conditions. Compatibility with FN Five-Seven magazines means access to proven, reliable feeding and a large aftermarket supply of ammunition and spare magazines.

This platform benefits operators, competitive shooters, and home-defense-minded civilians who value modularity and low-recoil operation. Weighing just 5.2 lbs and measuring 31.5 inches fully extended, the DBX57 transitions smoothly between vehicles, buildings, and tactical environments where a full-size rifle is impractical. The brace configuration and compact dimensions make the Diamondback DBX57 an ideal choice for shooters seeking a specialized platform that doesn't compromise on features or reliability. Installation is straightforward for users familiar with modern tactical platforms, and the standardized M-LOK ecosystem ensures rapid adaptation to mission-specific requirements.