$378.61
Availability: In Stock
Current Stock: Out of stock
Building an AR-15 in .300 Blackout calls for the right upper receiver assembly, and the Tacfire AR-15 complete upper in .300 Blackout with a 10-inch barrel delivers a no-nonsense platform ready to work out of the box. This upper comes fully assembled with a bolt carrier group and charging handle—mount it to a compatible lower receiver and you're ready to shoot. The 1:8 twist rate is optimized for .300 Blackout, the subsonic-friendly cartridge favored by hunters running suppressors and shooters who want the ballistic flexibility of both heavy and light loads from a single rifle.
The 10-inch barrel keeps the overall footprint compact without sacrificing the velocity window that makes .300 Blackout work. Whether you're setting up a short-range hunting rifle, a suppressed home-defense build, or an all-around pack gun for backcountry work, this upper gives you the core engineering you need at a practical price point. The M-LOK handguard plays well with modern accessories—rail scales, vertical grips, pressure pads, and light mounts attach easily if you want to configure it for your mission.
Tacfire uppers are built to function reliably in the field. This one ships ready to pair with your lower, so your build timeline is shorter and your focus stays on getting rounds downrange and dialing in your setup. If you already have a lower receiver spec'd and waiting, this complete upper eliminates guesswork and gets you to the firing line faster.
| Caliber | .300 Blackout |
| Barrel Length | 10 inches |
| Twist Rate | 1:8 |
| Handguard Type | M-LOK |
| Includes | Bolt carrier group, charging handle |
| Finish | Black |
This upper comes fully assembled with the bolt carrier group and charging handle already installed. You'll need a compatible AR-15 lower receiver to attach it to. Once mated and pinned together, your rifle is ready to function.
Yes. The .300 Blackout cartridge was designed to deliver full power from a suppressor, and the 10-inch barrel works well in that role. The 1:8 twist will stabilize both subsonic and supersonic .300 Blackout ammunition.
The upper features an M-LOK handguard, which accepts M-LOK accessory mounts. This is a modern, lightweight system that gives you clean options for adding lights, lasers, grips, or rail sections as needed.
The upper itself will work with standard AR-15 lower receivers and components. Accessories you mount on the handguard need to be M-LOK compatible; other standard AR-15 parts (charging handle, bolt carrier) are included and integrated.
SKU: 167524259 • Width: 3.3in • Height: 3.2in • Depth: 20.25in • Weight: 3.95oz
Availability: In Stock
Current Stock: Out of stock
Building an AR-15 in .300 Blackout calls for the right upper receiver assembly, and the Tacfire AR-15 complete upper in .300 Blackout with a 10-inch barrel delivers a no-nonsense platform ready to work out of the box. This upper comes fully assembled with a bolt carrier group and charging handle—mount it to a compatible lower receiver and you're ready to shoot. The 1:8 twist rate is optimized for .300 Blackout, the subsonic-friendly cartridge favored by hunters running suppressors and shooters who want the ballistic flexibility of both heavy and light loads from a single rifle.
The 10-inch barrel keeps the overall footprint compact without sacrificing the velocity window that makes .300 Blackout work. Whether you're setting up a short-range hunting rifle, a suppressed home-defense build, or an all-around pack gun for backcountry work, this upper gives you the core engineering you need at a practical price point. The M-LOK handguard plays well with modern accessories—rail scales, vertical grips, pressure pads, and light mounts attach easily if you want to configure it for your mission.
Tacfire uppers are built to function reliably in the field. This one ships ready to pair with your lower, so your build timeline is shorter and your focus stays on getting rounds downrange and dialing in your setup. If you already have a lower receiver spec'd and waiting, this complete upper eliminates guesswork and gets you to the firing line faster.
| Caliber | .300 Blackout |
| Barrel Length | 10 inches |
| Twist Rate | 1:8 |
| Handguard Type | M-LOK |
| Includes | Bolt carrier group, charging handle |
| Finish | Black |
This upper comes fully assembled with the bolt carrier group and charging handle already installed. You'll need a compatible AR-15 lower receiver to attach it to. Once mated and pinned together, your rifle is ready to function.
Yes. The .300 Blackout cartridge was designed to deliver full power from a suppressor, and the 10-inch barrel works well in that role. The 1:8 twist will stabilize both subsonic and supersonic .300 Blackout ammunition.
The upper features an M-LOK handguard, which accepts M-LOK accessory mounts. This is a modern, lightweight system that gives you clean options for adding lights, lasers, grips, or rail sections as needed.
The upper itself will work with standard AR-15 lower receivers and components. Accessories you mount on the handguard need to be M-LOK compatible; other standard AR-15 parts (charging handle, bolt carrier) are included and integrated.
SKU: 167524259 • Width: 3.3in • Height: 3.2in • Depth: 20.25in • Weight: 3.95oz