Irons are the easy-button Magpul MBUS Pro. The selector comes from Battle Arms Development and is their BAD-ASS-PRO reversible ambidextrous safety, which allows for a shorter 60-degree throw. The trigger is a Midwest Industries C trigger, which is a curved single-stage 3.5-pound drop-in complete with anti-walk pins.
OUTFITTINGīecause the Diamondback Firearms DBX57 can use standard AR triggers and selectors, it seemed like a waste not to take advantage ourselves. This isn’t quite Ruger MkIII territory in terms of disassembly, but it certainly isn’t an AR. It takes a bit of finesse to take the barrel assembly in and out, so we suggest you try it a few times first. Take some care not to lose the bolt hold open or the small spring, or you’ll be crawling around the floor with a flashlight like you just lost the front detent spring on an AR. You have to wiggle out the entire barrel assembly, recoil spring, and bolt carrier. The next step will feel like you’re about to break something. The settings are visible through a port on either side of the receiver, so if you plan to paint your DBX, take care to mask off that area. The pistons are adjusted from the front of the gun with either a Phillips or flathead screwdriver there are no detents to push in first. We had designed a version that used interlocking gears to ensure that the settings were always synchronized, but it was too costly and required some of the components to be enlarged, which worked against our main design goals.” Walker tells us, “The requirement for each piston cap to have its gas setting selected independently was done solely to reduce complexity of the system. However, unlike the Versa Max, which uses hull length to determine gas pressure, the DBX requires manual adjustment, and both settings have to match for proper function. Though we’ve seen this before on the Remington Versa Max-based TAC-13 shotgun (see RECOIL Issue 42 for a full review) it certainly couldn’t be called common. Something that really stands out about the Diamondback Firearms DBX57 is that it uses not one, but two gas pistons.
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