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Questions & Answers
How long is the shorter 7.62x39 barrel and which price option is it? Manufacturer Answer

The short barrel configuration of the ARAK-21 upper is 12.5"

by Faxon Firearms, Manufacturer, June 8, 2022
will this work with the psa ks47 lower receiver Manufacturer Answer

The Faxon ARAK21 Upper is intended for use with any standard AR-15 lower receivers. It will not function with the ks47 lower.

by Faxon Firearms, Manufacturer, March 22, 2021
Customer Reviews
Expert Review
An amazing upper for you AR by Cal L, Gear Expert, December 2, 2016
To be fair I haven't used this a ton, but I have near a thousand rounds through it. I have been super impressed by its reliability. I have yet to have a single malfunction, which is amazing to me. It looks a little off compared to a standard AR up, b...
Read More...
13/15 found this helpful
Expert Review
Innovative Upper by Matt S., Gear Expert, December 10, 2019
Really well built upper with an innovative design. Piston reliability combined with super easy barrel swaps (either for caliber or length) as well as being an ambi upper (can setup ejection port for left or right side) make this a very versatile upp...
Read More...
2/2 found this helpful
Helpful Positive Review Faxon Arak-21 Marvel of Engineering by Sidney, March 3, 2020
I picked up a new in box Arak-21 with 16inch .300 and .556 barrels at an estate sale recently and it has proven to be by far the best Semi-Automatic rifle I have ever owned. In reliability, recoil, and accuracy and it blows my Sig 556, Bushmaster A...
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5/6 found this helpful
Helpful Negative Review Absolute waste of money, poor quality, cheap parts. Looks cool though! by Ash, Verified Owner, June 17, 2017
It does not fit properly (Requires hammering the lower pins into the upper in order to fit or filing in contact surfaces). In other words it's out of spec. Noticeable gap between the lower and upper after installation (If you somehow get those pins i...
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9/69 found this helpful
Most Recent Reviews Arak21 bullpup'd n good to go! by Sev, Verified Owner, August 28, 2025
The fact that you can have this become a bullpup alongside an A3 Industries Triad chasis system AND can shoot 7.62x39 pleases me to no end. Smooth operation, fine cycling, a stiff but solid gas block adjustment, and it shoots accurate enough to notic...
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Most Recent Reviews Item discription misleading by Tim Schwarz, Verified Owner, July 12, 2024
Excellent machining, quality fit and finish. I’m not giving Faxon two stars. I’m giving Optics Planet two. What’s included is misleading. I thought I was getting an upper assembled ready for 9mm and a 7.62x39 barrel for conversion. Why use ar9 descri...
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1/16 found this helpful
Read All 7 Reviews
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Product Info for Faxon Firearms AR15 Upper Receiver Groups 1

With a tough yet lightweight aluminum build and expert craftsmanship, the Faxon Firearms ARAK-21 Upper Receiver is the perfect upgrade for any marksman. Faxon Firearms designed these AR15 Upper Receivers with an ambidextrous charging handle to suit both left and right-handed shooters. This Faxon Firearms ARAK-21 Aluminum Upper Receiver features a top full-length Picatinny rail along with multiple other rails that create a comprehensive M4-style quad rail upper. Upgrade your rifle build today with this Faxon Firearms ARAK-21 AR15 Upper Receiver.image

WARNING: California`s Proposition 65

Specifications for Faxon Firearms AR15 Upper Receiver Groups 1:

Manufacturer: Faxon Firearms
Finish: Anodized
Color: Black
Fabric/Material: 6061-T6 Aluminum
Gun Type: Rifle
Gun Model: AR-15
Condition: New
Magazine Included: No

Features of Faxon Firearms ARAK-21 Upper Receivers:

  • Fully machined from an aircraft grade 6061-T6 aluminum billet in a one piece design that incorporates a full length picatinny rail (Mil-STD-1913) on the top and three additional rails on the muzzle end of the receiver, making it a full M4 style quad rail upper. The top picatinny rail is laser engraved for optic placement.
  • Charging handle is ambidextrous, non-reciprocating, foldable, spring returned and is easily relocated from left to right side without tools by the operator.
  • Model ?39? Eight (8) lug bolt design with involute profile for both right and left hand versions. The extractor is positioned at 3 o?clock. This allows for a left hand version to use the same bolt by simply removing the cam pin and rotating 180 degrees and reinstalling the cam pin.
  • Self-contained firing pin retention system enclosed in a rectangular bolt carrier that no longer requires a cotter pin.
  • Bolted in hardened steel rail system for the bolt carrier to ride on. This allows a metal on metal wear surface for better wear characteristics and much smoother operation.
  • Allows a folding stock to be added, as recoil system does not extend beyond the upper receiver to fully operate. Eliminates the noise and feel of the buffer tube cycling back and forth.

Package Contents:

  • Faxon Firearms ARAK-21 Upper Receivers
  • Manual

Faxon Firearms AR15 Upper Receiver Groups 1 Orderable Models

List of Orderable Models

Faxon Firearms ARAK-21 Complete Upper Receiver, 7.62x39, 15 inch Aluminum Handguard, 16 inch Taper Barrel, Gen 2 BCG, A2 Flash Hider, Black, FX916U, URSSB762 , MPN: URSSB762 , UPC: 816341021969 , Code: 11I-URC-FFA21UR-URSSB762
Faxon Firearms ARAK-21 16in 5.56 Complete Upper, URSSB556 , MPN: URSSB556 , UPC: 816341021952 , Code: 11I-URC-FFA21UR-URSSB556

Faxon Firearms AR15 Upper Receiver Groups 1 Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Faxon Firearms ARAK-21 Complete Upper Receiver, 7.62x39, 15 inch Aluminum Handguard, 16 inch Taper Barrel, Gen 2 BCG, A2 Flash Hider, Black, FX916U, URSSB762 , MPN: URSSB762-DEMO , Code: 11I-URC-FFA21UR-URSSB762-DEMO
Faxon Firearms ARAK-21 Stock Configuration 5.56 & 7.62x39 URSSB556762 , MPN: URSSB556762 , UPC: 816341021976 , Code: 11I-URC-FFA21UR-URSSB556762

Proposition 65 Warning for California Consumers

For more information go to www.p65warnings.ca.gov

Notification

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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