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TacFire built this one to take the headache out of a .300 Blackout build. It's a complete upper assembly with a 16" black nitride barrel, a 1:8 twist that handles the full range of .300 BLK bullet weights, and a bolt carrier group already dropped in. Slide it onto a compatible AR-15 lower, push your takedown pins, and you've got a working rifle without sourcing a dozen small parts.
The barrel runs a pistol-length gas system, which is the standard setup for .300 Blackout and part of what makes the cartridge cycle so well across both supersonic and subsonic ammo. That short gas system also plays nicely with suppressors, so if a can is in your future, this upper is already speaking the right language. The muzzle comes threaded 5/8×24 with an A2-style device installed, so swapping to a brake, flash hider, or suppressor mount is a quick job.
The receiver is 7075-T6 aluminum with a black anodized finish, and the free-float M-LOK handguard gives you plenty of real estate for lights, grips, bipods, or a hand stop wherever you want them. Since the barrel floats inside the rail, nothing you clamp on there touches the barrel, which helps keep your groups consistent. The flat-top receiver is optic ready, so mount whatever red dot, LPVO, or magnified glass fits how you plan to shoot.
Folks who like .300 Blackout tend to be after a do-it-all setup: quiet subsonic loads for close work and hunting, heavier supersonic rounds for a little more reach, all through a rifle that stays short and handy. Buyers have pointed out that the fit and finish punch above what they expected, noting the metal M-LOK handguard, a solid dust cover, and a bolt carrier group that felt on par with name-brand uppers they were replacing. For anyone finishing a first build or adding a dedicated Blackout upper to a spare lower, this is a straightforward way to get there.
Just about. It ships as a complete assembly with the barrel, handguard, and bolt carrier group already installed, so you only need to mate it to a compatible AR-15 lower. Double-check that you have a charging handle on hand, since availability of that piece can vary by listing, and confirm your lower is set up before your first range trip.
It's a great match for one. The muzzle is threaded 5/8×24 and uses a pistol-length gas system, which is the setup .300 Blackout was designed around for reliable cycling with both supersonic and subsonic ammo. Swap the A2 device for your suppressor mount and you're good to go.
The 1:8 twist on this TacFire barrel is a versatile choice that stabilizes the wide spread of .300 Blackout loads, from lighter supersonic rounds to the heavy subsonic bullets in the 200-grain range. That flexibility is a big part of why people gravitate toward this caliber. You can run one upper for hunting, plinking, and suppressed shooting without changing anything.
Yes. This upper uses a standard mil-spec AR-15 receiver footprint, so it pins onto typical multi-cal or 5.56 lowers using your normal takedown and pivot pins. Since .300 Blackout shares the same magazines and bolt face as 5.56, most standard AR mags will feed it fine.
| UPC | 729205501050 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BU30016 |
| Action | |
| Barrel Finish | Black Nitride |
| Barrel Length | 16" |
| Caliber/Gauge | .300 AAC Blackout |
| Product Type | Complete |
| Shipping Weight | 4.786 |
| Sights | None, Optic Ready |
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