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Diamondback's Obsidian series is where the company stopped building budget ARs and started building the gun their own crew wanted to shoot, and this 11.5 inch pistol version shows it. The heart of the build is a Diamondback-made 11.5 inch barrel in 4150 Chrome Moly Vanadium steel with a 1:8 twist and black nitride treatment inside and out, capped with the DB Obsidian muzzle brake on standard 1/2×28 threads. A carbine-length gas system keeps the gun running smoothly at this barrel length, and the shot-peened, magnetic particle inspected 8620 bolt carrier group is the kind of quality check you usually see on pricier rifles.
What separates the DB15 Obsidian from a rack-grade AR pistol is the control setup. You get an ambidextrous safety selector and mag release, a Battle Arms enhanced bolt catch, and a Breek Arms Warhammer ambi charging handle, so lefties and anyone running the gun from awkward positions are covered. The furniture is legit too: a Magpul MOE K2 grip with a more vertical angle that suits shorter guns, and an SB Tactical SBA5 brace out back. The whole package wears an OD Green finish over forged 7075-T6 upper and lower receivers, with a Magpul MOE enhanced trigger guard for gloved hands.
The 11 inch M-LOK V4 S-Rail free floats the barrel and locks in with an anti-rotation design, so your lights and lasers hold zero. You get a full-length Picatinny top rail for optics plus integrated QD sling mounts, which means no hunting for aftermarket sling hardware. It ships without sights, so plan on adding a red dot or backup irons to the flattop upper.
At 6.25 pounds and 28.25 inches with the brace collapsed, this is an easy gun to move with, whether that means working around the house, tucking it into a truck bag, or just enjoying a compact 5.56 on range day. It feeds from the included 30-round Magpul Gen M3 PMAG and takes standard AR-15 mags, so keeping it fed is never a problem.
No, this one ships without sights. The flattop upper has a full-length Picatinny rail that runs seamlessly onto the handguard, so mounting a red dot, LPVO, or a set of flip-up irons is quick and easy. Most buyers pair a short pistol like this with a red dot for fast target work.
Quite a bit. The Obsidian line adds an ambidextrous safety and mag release, a Battle Arms enhanced bolt catch, a Breek Arms Warhammer ambi charging handle, and Magpul furniture including the MOE K2 grip and enhanced trigger guard. The free-float anti-rotation M-LOK handguard with built-in QD mounts is also a step up from basic drop-in rails.
Yes, the 11.5 inch barrel with carbine gas is one of the most proven short AR configurations out there, going back to military designs. It gives the gas system enough dwell time to cycle consistently across a wide range of 5.56 and .223 loads. The nitride-treated 4150 CrMoV barrel and MPI-tested bolt carrier group add to the long-term durability.
It runs standard AR-15 pattern magazines, so PMAGs, aluminum GI mags, and just about anything else built to spec will feed it. Diamondback includes one 30-round Magpul Gen M3 PMAG in the box to get you started.
| UPC | 810035756250 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DB1984K101 |
| Action | |
| ATF Type | RIFLE |
| Barrel Finish | Black Nitride |
| Barrel Length | 11.5" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 + 1 |
| Color | ODG |
| Length | 7.5'' |
| Magazine Included | 1 x 30-Round |
| Model | |
| Mount | Picatinny/QD Monuts |
| Number of Magazines | 1 30 rd. PMag |
| Package Height | 3.7 |
| Package Width | 9.0 |
| Product Type | Semi-Auto Pistol |
| Safety | Thumb |
| Shipping Weight | 7.55 |
| Sights | No Sights |
| Thread Pattern | 1/2"x28 |
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