Product Features & Specifications

Faxon Firearms URSSB556P ARAK-21 Complete Upper 5.56 NATO Black

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), or two, depending on which package you purchase.

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.

Due to the unique and innovative features of the ARAK-21 upper receiver, there are very few parts that are interchangeable with a standard AR-15.The firing pin, extractor spring, and ejector spring are the only parts that are standard and interchangeable with an AR-15 upper receiver.

Brand	Faxon Firearms
Series	Complete Upper
Model	ARAK-21
Caliber	5.56 NATO
Barrel Length Range	12" to 12.99"
Barrel Finish	Black
Material Type	6061 T6 Aluminum
Barrel Length	12.50"
Receiver Finish	Black Anodized
Weight	5 lbs
SKU	169241
UPC	816341025608
MPN	URSSB556P