Faxon Firearms FX338A5125-U Ion Complete Upper 338 ARC 12.50" Black Anodized Barrel

The Faxon Firearms FX338A5125-U Ion Complete Upper in .338 ARC with 12.50" barrel represents a purpose-built solution for shooters seeking a compact, hard-hitting intermediate cartridge platform. Designed for tactical applications, hunting, and precision rifle builds, this complete upper assembly eliminates the guesswork of component matching and delivers a field-ready system out of the box. The .338 ARC cartridge offers superior ballistics compared to 5.56 NATO while maintaining manageable recoil and barrel length, making it ideal for law enforcement designated marksmen, military support roles, and civilian operators who demand versatility at extended ranges.

Built on Faxon's proven Ion platform, this upper receiver features a 12.50" barrel that balances velocity retention with portability—critical for CQB-adjacent engagements and vehicle-mounted platforms. The black anodized finish provides corrosion resistance and a low-reflectivity profile essential for tactical operations, while the complete assembly includes the bolt carrier group, charging handle, and rail system for immediate functionality. Weighing 5.59 pounds, this upper maintains a lightweight profile without sacrificing rigidity or accuracy potential, and the .338 ARC's inherent accuracy and energy delivery make it particularly effective for intermediate-distance engagement scenarios where standard 5.56 performance falls short.

This complete upper pairs seamlessly with standard AR-15 lower receivers, making it an excellent upgrade path for operators who already have compatible lower assemblies in inventory. Installation requires only basic armorer-level knowledge—secure the upper to your lower, function-check the bolt carrier group, and you're mission-ready. Professional shooters, reserve components personnel, and civilians building modern sporting rifles will appreciate the quality control inherent to Faxon's manufacturing and the immediate performance advantage the .338 ARC platform delivers compared to legacy intermediate cartridge options.