FREE SHIPPING & FREE RETURNS*
0 Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
Blazin' Deal TRYBE Defense Cowl Induction Muzzle Brake, 5.56/.223 Remington, 5/8x24, Black, TRBCIB55658x24
TRYBE Defense Cowl Induction Muzzle Brake, 5.56/.223 Remington, 5/8x24, Black, TRBCIB55658x24
(37)
List: $132.99 $37.49 Save Up to $145.50
Clearance TRYBE Defense AR-15 Pistol Complete Upper Receiver, 5.56mm, 10.5in, 1-7 Twist, A2 Flash hider, UPPER105556
TRYBE Defense AR-15 Pistol Complete Upper Receiver, 5.56mm, 10.5in, 1-7 Twist, A2 Flash hider, UPPER105556
(49)
List: $429.99 $279.99 Save Up to $180.00
Clearance TRYBE Defense Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16in 5R Barrel, 1-7 Twist, 15in M-LOK Rail, A2 Flash Hider, BCG and CH, Nitride Black, UPPER16556
TRYBE Defense Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16in 5R Barrel, 1-7 Twist, 15in M-LOK Rail, A2 Flash Hider, BCG and CH, Nitride Black, UPPER16556
(49)
List: $549.99 $369.99 Save Up to $180.00
Best Rated TRYBE Defense AR-15 5.56 Complete Bolt Carrier Group BCG, High-Polished Black Chrome Nitride, BCG556-BC
TRYBE Defense AR-15 5.56 Complete Bolt Carrier Group BCG, High-Polished Black Chrome Nitride, BCG556-BC
(80)
List: $194.99 $144.99 Save Up to $75.00
TRYBE Defense Magnite Charging Handle, AR-15, Ambidextrous, Black, CHMAGAR15-BK
TRYBE Defense Magnite Charging Handle, AR-15, Ambidextrous, Black, CHMAGAR15-BK
(51)
List: $64.99 $49.99 Save $15.00
Blazin' Deal TRYBE Defense 16 in Wylde Government Profile AR Carbine Barrel, .223 Wylde, 1/2X28 Threads, Nitride, Black, BARCARBT16223
TRYBE Defense 16 in Wylde Government Profile AR Carbine Barrel, .223 Wylde, 1/2X28 Threads, Nitride, Black, BARCARBT16223
(22)
List: $172.99 $89.99 Save Up to $83.00
Final Sale TRYBE Defense 5.56 NATO Medium Profile AR Rifle Barrel, Black, 16in, BARRIF16556
TRYBE Defense 5.56 NATO Medium Profile AR Rifle Barrel, Black, 16in, BARRIF16556
(8)
List: $174.99 $99.99 Save Up to $85.48
Best Rated TRYBE Defense Muzzle Brake .223/5.56, 1/2x28, Black, TRBDMZBK20-BK
TRYBE Defense Muzzle Brake .223/5.56, 1/2x28, Black, TRBDMZBK20-BK
(14)
List: $89.99 $52.99 Save Up to $37.00
Blazin' Deal TRYBE Optics DiMA1000 Laser Rangefinder with Mount, Black, TROLRF
TRYBE Optics DiMA1000 Laser Rangefinder with Mount, Black, TROLRF
(6)
List: $764.99 $647.73 Save Up to $205.00
Blazin' Deal TRYBE Defense AR-15 .223 Remington/5.56mm NATO A2 Flash Hider, black, A2FH556
TRYBE Defense AR-15 .223 Remington/5.56mm NATO A2 Flash Hider, black, A2FH556
(14)
List: $16.99 $9.99 Save Up to $13.90
Questions & Answers
Can it be modified to work with an ak magazine? Manufacturer Answer

No, the ARAK-21 will not accept or function with AKM pattern magazines.

by Faxon Firearms, Manufacturer, May 28, 2025
How much does it weigh? Manufacturer Answer

The upper with 16" 5.56 barrel installed weighs 5.6 lbs

by Faxon Firearms, Manufacturer, May 28, 2025
Customer Reviews
Helpful Positive Review One of The Best Piston Ars by Payle Ryder, Verified Owner, March 17, 2024
Been researching piston uppers for years and by far the best ive found is the arak21. Came within a week of ordering. Fits any mil spec ar lower. The adjustable gas block makes this a perfect system for suppressors. The long strong piston also reduce...
Read More...
17/17 found this helpful
Helpful Positive Review Definitely worth a look by Swift, Verified Owner, December 28, 2024
This upper is an interesting addition to my lineup. In short, consistent groups with a con of weight. Out of the box I had fitment issues. Takedown pins were about a millimeter off. After getting over my initial irritation, i broke down the upper an...
Read More...
5/5 found this helpful
Helpful Positive Review Faxon Quality by MSG RET, Verified Owner, September 29, 2024
Out of the box, the quality of this upper is exceptional. The milling, finish, design, and function are top shelf. I own many piston uppers and I consider this upper to be the all-around best. I hope my range fire experience is as positive as the un...
Read More...
1/1 found this helpful
Helpful Positive Review Good over all. by Kaz, June 23, 2024
A part of me wants to give this 4 stars. Only because it is advertised as having the ability to quickly change barrels. However finding the shorter or 300 BO is not available anywhere currently. That and the "sand" tone doesn't really match the FDE. ...
Read More...
2/3 found this helpful
Read All 4 Reviews

We've got an AWESOME deal for you!

Blazin' DealFor models with this label.
Prices have been cut drastically on select models of this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts - sorry about that. This offer won't last long, so don't miss out!
In Stock
3 Models Available

Show with deals only:

Blazin' Deal
Caliber
All
Barrel Length
All
Threads per Inch
All
Muzzle Device
All
Finish
All
Color
All
Search
Free Shipping*

Product Info for Faxon Firearms ARAK-21 Complete Upper Receiver

This Faxon Firearms ARAK-21 Complete Upper Receiver is gas piston actuated and designed to seamlessly integrate with your AR15 platform. Faxon Firearms built these AR15 Upper Receivers with an ambidextrous charging handle and safety selector to suit both left and righthanded marksmen. Machined from aircraft-grade aluminum in a one-piece design, these AR15 uppers are incredibly durable and are compatible with folding stocks. The top Picatinny rail is T-marked for precise optic mounting, and the three additional rails make it a complete quad rail upper that can be customized with weapon lights, laser sights, and other accessories. With no change to your lower receiver, you can instantly install the ARAK-21 without the use of tools. Create your perfect AR platform with the Faxon Firearms ARAK-21 complete upper.image

WARNING: California`s Proposition 65

Specifications for Faxon Firearms ARAK-21 Complete Upper Receiver:

Manufacturer: Faxon Firearms
Overall Length: 21.5 in
Barrel Profile: Medium
Gas System Length: Rifle Length
Barrel Twist Rate: 1-8
Handguard Style: Quad Rail
Gun Rail: Quad Rail
Gun Type: Rifle
Gun Make: AR Platform
Gun Model: AR-15
Condition: New
Magazine Included: No
Mount Type: Picatinny

Features of Faxon Firearms ARAK-21 Complete Upper Receiver:

  • Ambi Non-Reciprocating Forward Charging Handle
  • Ambi Safety/Selector
  • Bufferless System
  • Quad Rail
  • MuzzLok Muzzle Device
  • Variable-Setting Gas System
  • Self-Contained Firing Pin Retention System
  • Steel Rail System for Bolt Carrier
  • Caliber Conversions Available

Package Contents:

  • Faxon Firearms ARAK-21 Complete Upper Receiver
  • Shipping Box
  • Manual
  • BAU Removal Tools
  • Bolt(s) And Firing Pin(s) for Ordered Calibers
  • Recoil Spring(s) for Ordered Calibers

Faxon Firearms ARAK-21 Complete Upper Receiver Orderable Models

List of Orderable Models

Faxon Firearms ARAK-21 Complete Upper Receiver, 12.5in 7.62x39, URSSB762P , MPN: URSSB762P , UPC: 816341025615 , Code: 11I-URC-SDF2-URSSB762P
Faxon Firearms ARAK-21 Complete Upper Receiver, 12.5in, 5.56, URSSB556P , MPN: URSSB556P , UPC: 816341025608 , Code: 11I-URC-SDF2-URSSB556P
OpticsPlanet Exclusive Faxon Firearms Complete Upper Receiver, ARAK-21, 16in, 5.56, MuzzLok, Sand, URSSB556-OP-SND , MPN: URSSB556-OP-SND , UPC: 816341028098 , Code: 11I-URC-SDF2-URSSB556-OP-SND

Faxon Firearms ARAK-21 Complete Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

USED, OpticsPlanet Exclusive Faxon Firearms Complete Upper Receiver, ARAK-21, 16in, 5.56, MuzzLok, Sand, URSSB556-OP-SND , MPN: URSSB556-OP-SND-EDEMO , Code: 11I-URC-SDF2-URSSB556-OP-SND-EDEMO-RE-B

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

You can only compare up to 4 products.
Please remove a product before adding another one to your comparison view.