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If you've been curious about the 5.7x28mm hype, the Diamondback DBX57 is one of the most approachable ways to get in on it. This large-format pistol runs a locked breech, dual gas piston action with an 8-inch threaded stainless barrel and a 1:9 twist, all built around monolithic 7075-T6 aluminum receivers and a 6061 M-LOK handguard. The result is a gun that comes in right around three pounds bare and runs about 15.25 inches long, which is light enough that you'll do a double take the first time you pick one up.
What really sets the DBX apart is that dual piston gas system. It's user-adjustable across four positions with nothing more than a flathead screwdriver, and the settings are visible through windows on each side of the handguard. That means you can tune it on the fly to run different 5.7 loads reliably or dial it down when you're shooting suppressed. The piston design also keeps the action cleaner than a direct-impingement setup, which is a nice bonus when you're putting rounds downrange all afternoon.
Diamondback leaned on the AR-15 world for the parts that matter to tinkerers. The trigger is a standard mil-spec AR15 unit, the safety is AR-pattern, and the grip is a Magpul MOE K, so swapping in your favorite upgrades is straightforward. The continuous top Picatinny rail leaves plenty of room for a red dot plus backup irons, the handguard is loaded with M-LOK slots for lights and lasers, and there's a rear Picatinny section and QD mount on the back. The charging handle is reversible for lefties and righties alike.
This one ships in black hard coat anodized finish with a single 20-round magazine that's compatible with the FN Five-seveN, plus the DBX muzzle device threaded 1/2×28. It does not come with sights or a brace, so plan on adding an optic to get the most out of it. It's a great fit for shooters who want serious capacity and firepower in a compact, low-recoil package, whether that's range fun, home defense, or building out a personal platform exactly how you like it.
No, this model ships without sights and without a brace. The top rail is full-length Picatinny and optic ready, so most shooters add a red dot and optional backup irons. There's also a rear Picatinny section and QD mount if you want to add a brace or stock down the road.
It uses FN Five-seveN pattern magazines and ships with one 20-round magazine. That compatibility makes finding spares easier, and the platform also accepts higher-capacity 5.7 mags from that family. Availability has improved a lot, with options widely sold online.
Very mild. The 5.7x28mm is a light-recoiling cartridge to begin with, and at roughly three pounds the DBX still balances well and stays easy to control. Reviewers consistently describe it as having virtually no felt recoil and being just plain fun to shoot.
Many of the key components are AR-15 compatible, including the mil-spec trigger and the safety selector, so dropping in aftermarket upgrades is simple. The Magpul MOE K grip is also a standard swap. Keep in mind that field stripping the DBX is noticeably different from an AR-15, so it's worth watching Diamondback's instructional videos first.
Yes. The dual gas piston system has four positions you can adjust with a flathead screwdriver while the unloaded gun is fully assembled. The numbered settings are visible through windows on each side of the handguard, letting you tune for different ammo or for running suppressed.
| UPC | 810035752696 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DB1614L001 |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 8" |
| Caliber/Gauge | 5.7 x 28 mm |
| Capacity | 20 + 1 |
| Color | Black |
| Length | 23 |
| Model | |
| Number of Magazines | 1 20rd. Magazine |
| Package Height | 9.0 |
| Package Width | 3.5 |
| Product Type | Semi-Auto Pistol |
| Safety | Yes |
| Shipping Weight | 4.55 |
| Sights | No Sights |
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