ARAK-21 Barrel Assembly Unit (BAU Only)
*ARAK-21 XRS Lower Receivers are not appropriate for standard AR-15s. The flared cuts and squared hoop will not allow standard manipulation with standard AR-15 uppers. The ARAK XRS lower does not include a buffer retaining pin.
Components of the ARAK-21® Upper Receiver:
The 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 new 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).
The BAU is comprised of the barrel, gas block, muzzle brake, gas piston, gas adjuster, and barrel trunnion. The only removable part of this assembly is the gas adjuster knob. The gas adjuster knob has 4 settings. Three of the settings allow different gas flows for optimum operation, and one setting blocks the gas flow for a single shot operation.
The upper receiver includes the charging block, standard charging handle, lower forearm with screws, three aluminum full length picatinny rails, three insulating shims, bolt carrier assembly, lower recoil lug with spring guide rod, and dual recoil spring system. Along with your new ARAK-21® upper receiver you will receive your owners manual, and two allen wrenches that will fit the screws that attach the lower forearm, and the front picatinny rails.
Other features include:
Charging handle is ambidextrous, non-reciprocating, foldable, spring returned and is easily relocated from left to right side without tools by the operator.
Self-contained firing pin retention system enclosed in a rectangular bolt carrier that no longer requires a cotter pin.
Due to changes in California gun laws we are no longer able to sell/ship the ARAK-21 XRS to California.