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The TacFire BU-556-10 takes most of the guesswork out of building a short 5.56 AR. It is a fully assembled upper built around a 10-inch black nitride barrel and a forged 7075-T6 aluminum receiver, and it comes with the bolt carrier group and charging handle already included. That means you can pull it out of the box, mate it to a compatible AR-15 lower, and be running the same afternoon without sourcing a pile of small parts.
The 5.56x45mm NATO chamber eats both 5.56 and .223 Remington, and the 1:8 twist rate is a nice middle-ground that stabilizes everything from lighter 55-grain loads to heavier match bullets. The barrel wears a black nitride finish inside and out for corrosion resistance and easy cleanup, and it is threaded 1/2×28 with an A2 flash hider spun on. A carbine-length gas system and low-profile .750 gas block keep the setup running under that free-float M-LOK handguard.
This upper ships optic-ready with no fixed sights, so the flat-top Picatinny rail is a clean slate for a red dot, LPVO, or your choice of iron sights. The M-LOK handguard gives you plenty of real estate for a light, laser, sling mount, or hand stop, and the free-float design keeps your accessories from putting pressure on the barrel. It rides on standard AR-15 lowers with M4 feed ramps, so it plays nice with the parts you likely already have.
A 10-inch barrel keeps the whole package short and quick-handling, which is the whole point of a build like this. It is a straightforward way to add a compact 5.56 configuration to your collection without the cost or time of piecing an upper together yourself.
Yes. This upper ships complete with a nitride-coated M16-profile bolt carrier group and a charging handle already included. All you need to add is a compatible AR-15 lower receiver to complete the build.
It is built to standard AR-15 spec and rides on any mil-spec compatible lower receiver, and it uses M4 feed ramps. As long as your lower is a standard 5.56/.223-pattern AR-15, this upper will pin right up.
The barrel has a 1:8 twist, which is a versatile choice for 5.56 and .223. It handles a wide range of bullet weights well, stabilizing common 55-grain loads through heavier 62 to 77-grain projectiles, so you are not locked into one type of ammo.
No, it ships optic-ready with a bare flat-top Picatinny rail and no fixed sights. That leaves you free to mount a red dot, magnified optic, or your preferred set of iron sights based on how you plan to run it.
| UPC | 729205518300 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BU55610 |
| Action | |
| Barrel Finish | Black Nitride |
| Barrel Length | 10" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Product Type | Complete |
| Shipping Weight | 3.669 |
| Sights | None, Optic Ready |
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