An Interesting 31-shot 4-Pound PDW

For the past few months, I have been kicking around a Diamondback DBX 57 pistol. Unlike most firearms chambered in 5.7x28mm, which are simple blowback weapons, the DBX is a large format pistol that uses a dual gas piston action that can be dialed up or down with the aid of a screwdriver in the field without stripping the gun down.

It accepts standard AR-15 triggers and grips while having the same style safety lever format. Unlike the AR, there is no buffer tube, and the locked-breech rotating bolt’s action is side-charging, oriented out of the box with a left-hand knob– but don’t worry, it can be swapped to the right if that’s how you swing. The barrel is threaded with a 1/2x28TPI pitch, opening it up to a wide array of muzzle devices and cans.

As far as mags go, it takes standard FN FiveseveN style double stacks, which are made in both factory and aftermarket variants in 10, 20, and 30-round formats.

And, I found out, that it shoots pretty well.

The total weight of the DBX with the Romeo5, TF1913 side-folding brace, and 21 rounds of V-Max came to 4.4-pounds, which is still balanced enough to fire one-handed with ease. You can move to 30-rounder FN mags and only add a couple extra ounces.

More in my column at Guns.com.

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