The TacFire AR-15 Complete Upper (brand part no. BU-556-11.5) is chambered in 5.56 NATO with an 11.5-inch barrel, fully built and ready to install on a compatible lower. It ships with a bolt carrier group already installed, saving builders the extra step of matching and fitting separate BCG components. This shorter barrel length suits pistol builds and short-barrel rifle configurations where maneuverability matters, giving shooters a ready-to-run upper without sourcing individual parts.

Key Specifications

• Chambered in 5.56 NATO with an 11.5-inch barrel.
• Ships as a complete upper, ready to drop onto a compatible lower.
• Includes a bolt carrier group already installed.
• Finished in black to match standard AR-15 hardware.
• Weighs approximately 4.241 lb as shipped.

Frequently Asked Questions

Does this upper include a bolt carrier group? Yes, a BCG comes installed and ready to use.

What barrel length does this upper use? 11.5 inches, chambered in 5.56 NATO.

Buy the TacFire Complete AR-15 Upper

Get a ready-to-run 5.56 upper from TacFire. Browse our full lineup of AR-15 uppers and order from our Lubbock, Texas gun shop for fast, insured shipping.