TacFire 5.56 NATO Black Nitride Upper Receiver Assembly

Upgrade your AR-15 build with the TacFire 5.56 NATO Black Nitride Upper Receiver Assembly — a reliable, hard-wearing solution designed for shooters who demand performance and durability without breaking the bank. Finished in a tough black nitride coating, this upper delivers excellent corrosion resistance, reduced friction, and long-lasting protection under demanding conditions whether you’re at the range, in the field, or running a competition build.

The black nitride finish penetrates the metal surface rather than sitting on top of it, providing superior hardness and wear resistance compared to standard phosphate or anodized finishes. Chambered in 5.56 NATO, this upper is compatible with standard AR-15 lower receivers and accepts both 5.56 NATO and .223 Remington ammunition, making it a versatile and practical choice for a wide range of applications.

At Deep Roots Rifle Co, we stock hard-to-find components and complete assemblies to support your next build — whether you’re a first-time builder or an experienced shooter looking to upgrade. Our knowledgeable staff in Eustis, Florida can help you pair this upper with the right components for your specific needs. Order online for fast shipping nationwide, or stop by our Eustis, FL store to see our full selection of AR-15 parts, accessories, and custom build options in person.