FAXON ARAK-21 556NATO 16 UPPER

The Faxon Firearms ARAK-21 556NATO 16 Upper is a complete upper receiver assembly engineered for seamless compatibility with the AR-15 platform. Featuring a gas piston operating system, this upper offers enhanced reliability and simplified maintenance compared to traditional direct impingement designs. Installation is straightforward, requiring no tools and utilizing only the standard take down and pivot pins to secure the upper to the existing lower receiver.

This assembly includes a 16-inch barrel, gas block, adjustable gas piston with a four-setting gas adjuster knob, and a muzzle brake. The gas adjuster provides three different gas flow settings for optimized cycling and a fourth setting that blocks gas flow for single-shot operation. The upper receiver is equipped with three full-length aluminum Picatinny rails for versatile accessory mounting, a standard charging handle, and a bolt carrier assembly designed specifically for this system. Additionally, the dual recoil spring system and lower recoil lug with spring guide rod contribute to smooth cycling and reduced recoil.

With its innovative design, the Faxon ARAK-21 upper offers a unique upgrade path for AR-15 users seeking a piston-driven configuration without replacing their lower receiver.