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Big cartridge, small footprint. The TacFire BU-308-12 takes the .308 Winchester round and squeezes it into a 12 inch barrel length, giving you a pistol upper that keeps the knockdown power of the caliber while trimming down the overall length for a more maneuverable build. It's built on the DPMS pattern, which is the most common AR-10 style footprint on the market, so it plays nice with a wide range of stripped lower receivers already out there.
The barrel is machined from 4150 chrome moly vanadium steel and finished in black nitride, a treatment that TacFire uses across its .308 barrel lineup for corrosion resistance and long-term durability without adding a premium price tag. It's cut with a 1:10 twist rate, which is the standard twist for stabilizing the full range of .308 bullet weights you'll find on the shelf. The receiver itself is 7075-T6 aluminum with a black anodized finish, and the free-float M-LOK handguard gives you plenty of real estate to mount a light, sling point, or foregrip without touching the barrel.
This upper ships with a bolt carrier group already fitted, so you're not left tracking down a compatible BCG separately before you can run it. It's optic ready with no iron sights included, which keeps things simple if you're planning to top it with a red dot or low power scope anyway. Just keep in mind this is the upper half only. You'll still need a compatible DPMS pattern stripped lower, and if you're setting it up as a pistol build, a buffer tube and brace to match.
A short barrel .308 upper like this one is popular for truck guns, home defense setups, or anyone who already has a .308 lower and wants a shorter, quicker handling option without buying a whole second rifle. Pairing a 12 inch barrel with the .308 cartridge does mean a louder report and more muzzle flash than you'd get from a longer barrel, so plan on ear protection and maybe a suppressor down the road if that matters to you.
This upper ships with the bolt carrier group installed but does not come with a charging handle. Most standard AR-10 or .308 pattern charging handles will work fine, so if you're swapping this onto an existing .308 lower you likely already have one on hand.
The BU-308-12 is built to the DPMS pattern, also called LR-308, which is the most widely used .308 AR platform footprint. Double check your lower receiver's pattern before ordering, since Armalite pattern lowers use different dimensions and won't mate up correctly.
At 12 inches this barrel length falls under pistol configuration when built on a lower without a shoulder stock. If you're assembling a complete AR-10 pistol you'll want a matching pistol buffer tube and an arm brace, neither of which come with this upper.
Shortening a .308 barrel to 12 inches trims velocity and effective range compared to a 16 or 18 inch setup, but it's still plenty capable for closer range work like home defense or a truck gun. The 1:10 twist rate keeps common .308 bullet weights stabilized, so accuracy stays solid within the ranges this build is meant for.
| UPC | 729205706943 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BU30812 |
| Shipping Weight | 5.85 |
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