Faxon Firearms FX338A2125-U Complete Upper 338 ARC 12.50" Black Anodized Barrel

The Faxon Firearms FX338A2125-U Complete Upper in .338 ARC with a 12.50" black anodized barrel is purpose-built for operators and precision rifle builders seeking intermediate-caliber performance in a compact form factor. This complete upper assembly delivers the ballistic advantage of .338 ARC—a cartridge engineered for extended-range accuracy and barrier-blind terminal performance—while maintaining a package suitable for CQB-focused platforms and hunting applications where maneuverability matters.

The 12.50" barrel strikes a practical balance between velocity optimization and overall rifle length. .338 ARC achieves reliable expansion and energy delivery at ranges beyond conventional 5.56 NATO, while the shorter tube reduces muzzle blast signature compared to longer barrels and keeps sight radius manageable for offset optics mounting. Black anodized finish provides corrosion resistance in field environments without adding weight. At 5.9 lbs, this upper pairs efficiently with lightweight lower receivers and furniture, enabling builds that remain nimble without sacrificing cartridge capability.

This complete upper is suited for precision shooters, tactical rifle builders, and hunters who run intermediate-length platforms for patrol rifle roles or hunting operations. The .338 ARC cartridge serves scenarios where 5.56 lacks sufficient range or penetration—urban defense behind cover, longer-range precision work, and controlled hunting applications. Faxon Firearms manufactures its own barrels and bolts, controlling quality from metal to finish. Builders select this upper when component reliability and verified dimensional accuracy are non-negotiable.