1. ARAK-21 XRS Complete Rifle System - Left Handed (5.56 and 300 Blackout Barrel Assembly Units Included)

ARAK-21 XRS Complete Rifle System - Left Handed (5.56 and 300 Blackout Barrel Assembly Units Included)

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Your Price: $2,199.00
Part Number: ARAK21LH
Availability: In Stock.

The ARAK-21 XRS is a complete rifle system, including Faxon Firearms' custom lower receiver that matches the ARAK-21 perfectly. 

  • Manufactured of 7075-T6 Billet Aluminum
  • Graceful complex curves show off the attention to detail and machining. 
  • Fully compatible with all AR-15 lower receiver parts kits. 
  • Set-screw retained take-down pin spring for easy assembly. 
  • Anodized Black or available in Cerakote FDE or OD. 
  • Enlarged, integrated trigger guard. 
  • Guarded, guided magazine release compatible with Norgon Ambi options.


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® will be shipped to you with two “Barrel Assembly Units” (BAU), the 5.56 and 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.

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.

ARAK-21 XRS Rifle Includes:

  • ARAK-21 XRS Rifle
  • 5.56 and 300 Blackout Barrel Assembly Units
  • B5 SOPMOD Bravo Stock (Black)
  • Hogue Grip (Black)
  • Ambidextrous Safety/Selector
  • Shipping Box
  • Manual
  • BAU Removal Tools
  • Magazine for chosen caliber(s) 5.56/300
  • Bolt(s) & Firing Pin(s) for Ordered Calibers
  • Recoil Spring(s) for Ordered Calibers


  • The standard ARAK-21 upper receiver with a 16" medium barrel weights in at 5.5 lbs. Pencil barrels remove .3 lbs and heavy barrels increase the weight .3 lbs. 

Note to California Residents:

Due to changes in California gun laws we are no longer able to sell/ship the ARAK-21 XRS to California.

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