The TacFire Pistol Upper Assembly, 5.56x45mm NATO, 10-inch Black Nitride Barrel, 7075-T6 M-LOK (brand part number BU-556-10) is a complete, ready-to-run upper for a 5.56 AR pistol build. TacFire chambers it in 5.56 NATO, safe for both 5.56 and .223 Remington ammunition, and tops the 10-inch Black Nitride barrel with a black-anodized 7075-T6 aluminum receiver and an M-LOK handguard. It ships completely built with a bolt carrier group already installed, optic-ready with no iron sights, and drops directly onto any compatible AR lower.

Key Specifications

• Chambered in 5.56x45mm NATO, safely running both 5.56 and .223 Remington.
• Barrel length of 10 inches for a compact pistol build.
• Barrel finish: Black Nitride for corrosion resistance.
• Receiver machined from 7075-T6 aluminum, black anodized.
• M-LOK handguard for lightweight accessory mounting.
• Ships with no iron sights, optic-ready.
• Ships completely built and ready to drop onto a lower.
• Includes a bolt carrier group.
• Ships at approximately 3.7 pounds.

Frequently Asked Questions

Does this upper include a bolt carrier group? Yes, it ships completely built with a bolt carrier group installed.

What ammunition can it run? Both 5.56 NATO and .223 Remington.

Buy the TacFire Pistol Upper Assembly, 5.56x45mm NATO, 10-inch Black Nitride Barrel, 7075-T6 M-LOK

Build a compact 5.56 pistol with an AR15 upper ready to drop onto your lower. Order it from our Lubbock, Texas gun shop for fast, insured shipping.