The TacFire Complete Upper in .45 ACP, 10 inches, black nitride (brand part no. BU45ACP10) gives AR-platform builders a ready-to-run option for one of the hardest-hitting pistol-caliber chamberings available. TacFire finishes the 10-inch barrel in black nitride for corrosion resistance and cuts a 1:16 twist rate to stabilize standard .45 ACP bullet weights. Built as a complete upper assembly, it is expertly assembled and tested for reliable functionality before it ships, letting builders skip individually sourcing a barrel, handguard, and gas system for a .45 ACP build. It is a straightforward way to add a pistol-caliber option to an existing AR-15 lower.

Key Specifications

• Chambered in .45 ACP.
• Barrel measures 10 inches.
• Cut with a 1:16 twist rate.
• Barrel is finished in black nitride for corrosion resistance.
• Sold as a complete upper assembly.

Frequently Asked Questions

What caliber is this upper chambered in? .45 ACP.

What twist rate does the barrel use? 1:16, matched to standard .45 ACP bullet weights.

Does this upper include a lower receiver? No, it is a complete upper only and needs a compatible AR-15 lower to finish the build.

Buy the TacFire Complete Upper, .45 ACP

Add a hard-hitting pistol-caliber option to your build with this TacFire upper, part of our full AR15 uppers lineup. Order it from our Lubbock, Texas gun shop and our team can help confirm fit with your lower.