Faxon Firearms ION Ultralight Complete Upper 5.56 NATO 16″

This is a complete upper receiver assembly from Faxon Firearms for the AR-15 platform. It is chambered for .223 REM/5.56 NATO and built around a 16-inch nitride steel pencil barrel with a 13-inch carbon-fiber M-LOK handguard. The assembly includes a Faxon Gunner lightweight bolt carrier group, adjustable gas block, and an ambidextrous charging handle. Made in the USA.

Key Specifications

• Chambered for .223 REM/5.56 NATO cartridge.
• The barrel measures 16 inches in length.
• The barrel is constructed of STEEL.
• The barrel finish is NITRIDE.
• Equipped with a 13-inch carbon fiber M-LOK handguard.
• Barrel contour is a Pencil profile.
• Includes a Faxon Gunner lightweight bolt carrier group.
• Features an adjustable gas block for system tuning.
• Includes an ambidextrous charging handle.
• Overall weight is approximately 3.1 lbs.

This complete upper is specified for builders and shooters who want a lightweight, accurate AR-15 component ready for range use, training, and general-purpose builds. The combination of a nitride pencil barrel, carbon-fiber M-LOK handguard, and a lightweight BCG provides a balance of low weight and practical durability for informed users seeking a straightforward, high-function upper assembly.