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The .300 Blackout cartridge does its best work out of short barrels, which is exactly why this 10 inch DB15 Carbon is such a sensible pairing. The round burns nearly all of its powder in that length, so you give up very little velocity compared to a full-size rifle while gaining a package that measures just 26 inches with the SBA3 brace collapsed. The 1:8 twist heavy profile barrel handles the full spread of Blackout loads, from light supersonic hunting rounds to heavy 220 grain subsonics, and the black nitride finish on the chrome moly vanadium steel keeps it protected through years of hard use.
The 5/8×24 threaded muzzle wears an A2 flash hider from the factory, but most folks buying a 10 inch Blackout pistol have a can in mind, and this one is set up for it. Spin off the A2, thread on your suppressor, load up subsonics, and you have one of the quietest semi-auto setups you can put together. The pistol-length direct impingement gas system cycles reliably, and the shot-peened, magnetic particle inspected 8620 bolt carrier is the same quality check you would expect on guns costing quite a bit more.
Diamondback forged the upper and lower from 7075-T6 aluminum, then dressed the whole thing in a Flat Dark Earth Cerakote that looks sharp and shrugs off scratches. The 9 inch PC M-LOK handguard gives you real estate for a light and hand stop without adding bulk, and the Magpul MOE grip is a proven piece of kit. SB Tactical's SBA3 brace adjusts through five positions on a mil-spec carbine tube, so swapping furniture down the road is simple. At 5.7 pounds it swings fast in tight spaces, which is the whole point of a gun like this.
You get one 30-round Magpul Gen M3 PMAG in the box, and the flat top upper is a blank slate for whatever red dot or LPVO you prefer since no sights are included. Made in the USA at Diamondback's Florida facility, this is a lot of short-barreled Blackout for the money.
Yes. The 10 inch barrel comes threaded 5/8×24, which is the standard pattern for .30 caliber cans, and it ships with an A2 flash hider you can remove in seconds. The 1:8 twist stabilizes heavy subsonic bullets well, so it makes an excellent suppressor host with 190 to 220 grain loads.
No sights are included on this model. The flat top upper receiver and M-LOK rail give you a clean platform to mount whatever you prefer, and most owners run a red dot on a gun this size. Plan on adding an optic before your first range trip.
The pistol-length gas system is well matched to the 10 inch barrel and handles both supersonic and subsonic ammunition. As with any short Blackout, subsonics cycle most consistently when suppressed since the added back pressure helps the action run. Unsuppressed, stick with quality factory subsonic loads and keep the gun lubed for best results.
It uses standard AR-15 magazines and ships with one 30-round Magpul Gen M3 PMAG. Since .300 Blackout was designed around the 5.56 case head, any quality AR mag will feed it. Many owners dedicate specific marked mags to Blackout to avoid mixing it up with 5.56 ammo, which is a smart habit.
| UPC | 810035754409 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DB1916B061 |
| Action | |
| ATF Type | Pistol |
| Barrel Finish | Black Nitride |
| Barrel Length | 10" |
| Caliber/Gauge | .300 AAC Blackout |
| Capacity | 30 + 1 |
| Color | Flat Dark Earth |
| Length | 26 |
| Magazine Included | 1 x 30-Round |
| Model | |
| Number of Magazines | 1 30rd. PMAG |
| Package Height | 9.0 |
| Package Width | 3.5 |
| Product Type | Semi-Auto Pistol |
| Safety | Thumb |
| Shipping Weight | 7.3 |
| Sights | No Sights |
| Thread Pattern | 5/8"x24 |
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