Faxon AR-15 ARAK-21 Complete Upper Receiver 7.62x39mm NATO 16" Barrel

The Faxon ARAK-21 is a gas piston actuated, complete upper receiver assembly designed to seamlessly interface with the standard AR-15 platform. The total extent of the interface is simply the take down pin, and the pivot pin. The ARAK-21 upper receiver offers you all its features with no change to your current lower receiver and can be installed in less than one minute with no tools. Your ARAK-21 upper receiver will be shipped to you with one "Barrel Assembly Unit" (BAU), or two, depending on w