Faxon Firearms ARAK21 Complete Upper Features The Faxon Firearms ARAK21 upper is built around a 16 inch barrel chambered in 5.56 NATO sized to meet standard rifle length requirements while keeping the ARAK21 platform s balance intact. The aluminum receiver is finished in a Tungsten coating that resists wear while giving the upper a distinct modern appearance. As a complete upper assembly it is designed to mate directly to a compatible ARAK21 lower simplifying the build or upgrade process for owners of that platform. Faxon s manufacturing standards carry through into this upper reflecting the company s background in precision barrel production. Because this is sold as a complete upper rather than a bare barrel it arrives ready to install without additional machining or fitting. The Tungsten finish is applied for durability against everyday handling and environmental exposure keeping the upper looking clean through extended use. A 5.56 NATO chambering keeps the upper compatible with widely available ammunition making it a practical choice for range use competition or duty-style builds. This upper gives ARAK21 owners a straightforward path to a complete ready-to-shoot 16 inch barreled upper. Faxon Firearms ARAK21 Complete Upper Specifications Manufacturer: Faxon Firearms Model: ARAK21 Complete Upper Caliber: 5.56 NATO Barrel Length: 16 Receiver Material: Aluminum Receiver Finish: Tungsten Available At: GrabAGun