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Faxon Firearms

Faxon Firearms ARAK-21 Upper Receiver 16 Combo

Faxon Firearms ARAK-21 Upper Receiver 16 Combo
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Availability: Out of stock




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) in 16" Medium profile 5.56 caliber and 16" Heavy profile 300 Blackout.

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.

Additional Info

Additional Info

SKU Upper:ARAK-21 Barrel Combo
Manufacturer Faxon Firearms
Finish No
Barrel Length 16"
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (1)

Excellent System For AR'sReview by
I have had my Faxon for about a year now and love it.

Easy to clean, reliable, fun to shoot, low recoil, as accurate as any DI AR and barrels can be changed out in minutes to switch calibers (5.56 & 300 BLK) or to change lengths.

Yes the fore end gets hots after several magazines of 5.56, but if you run BLK like I do I can shoot hundreds of rounds before it requires gloves.

Add your favorite suppressor and have hours of even more fun!

I do suggest that if you shoot at an indoor range, change the muzzle brake as the stock Loud Mouth is LOUD and will scare people even down at the far end of the range!!
(Posted on 2/23/2015)

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