Your basket is empty.

Basket

Help and contact

Free standard delivery over £199

100-day return policy

Newsletter

Sale

Over 300,000 customers - we say thank you!

4.93/5 "Very good" (1400+ reviews)

40,000+ products for hunting and shooting sports

Upgrade your AR-15 with the ARAK-21® complete upper receiver featuring a gas piston system, ambidextrous charging handle, and quick installation.

FAXON FIREARMS ARAK-21 5.56 NATO COMPLETE UPPER RECEIVER 16" MEDIUM BBL BLK

816341021952 430108199

Filters:

Variations

Filters:

Variations:

Upgrade your AR-15 with the ARAK-21® complete upper receiver featuring a gas piston system, ambidextrous charging handle, and quick installation.

ARAK-21 5.56X45 NATO COMPLETE UPPER RECEIVER - ARAK-21 5.56 NATO COMPLETE UPPER RECEIVER 16" MEDIUM BBL BLK

1489.9 GBP 0 £1,489.90 *

Backorderable

Cartridge: 5.56 x 45 Color: Black Finish: Anodized Length: 16'' Make: AR-15 Style: Complete Product no.: 430108199

Backorderable

1489.9 GBP 0 £1,489.90 *

The ARAK-21® upper receiver offers a gas piston system, easy installation, ambidextrous charging handle, and a robust design for seamless AR-15 integration.

ARAK-21 5.56X45 NATO COMPLETE UPPER RECEIVER - ARAK-21 5.56 NATO COMPLETE UPPER RCVR 12.5" MEDIUM BBL BLK

1409.9 GBP 0 £1,409.90 *

Backorderable

Cartridge: 5.56 x 45 Color: Black Finish: Anodized Length: 12.5'' Make: AR-15 Style: Complete Product no.: 430108200

Backorderable

1409.9 GBP 0 £1,409.90 *

1409.9 1489.9 2 GBP

1489.9 GBP £1,489.90

Prices inclusive of duty & VAT.

Product no.: 430108199

Mfr. No.: URSSB556

816341021952 ARAK-21® Features 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® 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. Other features include: The upper receiver is 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. There are also half-length picatinny rails available. Long stroke variable setting gas piston system. There are three options for gas flow, and one for no gas flow. This allows for single shot operation. There is also a clean out port for the gas block between the gas cylinder, and the barrel. 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 a much smoother operation. The ARAK-21® system allows for a folding stock to be added, as our recoil system does not extend beyond the upper receiver to fully operate. This eliminates the noise and feel of the buffer tube cycling back and forth.

Backorderable

Backorderable, delivery time approx. 4-12 weeks from the USA warehouse.

100-Day Return Policy

No charges until we ship

No charge:
Your credit card will not be charged when you place your order.

No commitments:
You are under no obligation until the goods are shipped. You can cancel your order at any time before shipping - free of charge.

Not until shipping:
Your credit card will only be charged once we ship your order. Not before.

Seamless AR-15 compatibility
Ambidextrous charging handle
Folding stock capability

Wish List Ask question

order by phone

1409.9 1489.9 2 GBP

Description Specification Customers reviews Accessories

FAXON FIREARMS ARAK-21 5.56 NATO COMPLETE UPPER RECEIVER 16" MEDIUM BBL BLK

1489.9 GBP £1,489.90

Prices inclusive of duty & VAT.

Is a 'Call to order' product.

Requires order by phone

Description:

Upgrade your AR-15 with the innovative ARAK-21® complete upper receiver!

The ARAK-21 5.56X45 NATO COMPLETE UPPER RECEIVER from Faxon Firearms is a state-of-the-art assembly designed to enhance your shooting experience. This gas piston actuated upper receiver seamlessly interfaces with the standard AR-15 platform, offering a unique blend of functionality and ease of installation.

Key Features:

Quick Installation: Install the ARAK-21® upper receiver in less than one minute without any tools.
Barrel Assembly Unit (BAU): Comes with one or two BAUs, including the barrel, gas block, muzzle brake, gas piston, gas adjuster, and barrel trunnion.
Gas Adjuster: Features a gas adjuster knob with 4 settings for optimal operation, including a single shot mode.
Complete Assembly: Includes charging block, standard charging handle, lower forearm with screws, three aluminum full-length picatinny rails, insulating shims, bolt carrier assembly, lower recoil lug with spring guide rod, and dual recoil spring system.
Durable Construction: Machined from aircraft grade 6061-T6 aluminum billet with a full-length picatinny rail and additional rails for accessories.
Ambidextrous Charging Handle: Easily relocated from left to right side without tools.
Self-Contained Firing Pin System: Enclosed in a rectangular bolt carrier, eliminating the need for a cotter pin.
Enhanced Recoil System: Allows for a folding stock without extending beyond the upper receiver.

Compatibility:

While the ARAK-21® upper receiver has unique features, it does share some standard parts with the AR-15 platform. The firing pin, extractor spring, and ejector spring are interchangeable, providing versatility for users.

With the ARAK-21®, you’re not just upgrading your firearm; you’re enhancing your entire shooting experience. Explore the possibilities with this cutting-edge upper receiver from Faxon Firearms today!

Restrictions

Is a 'Call to order' product.

Attributes

Cartridge:
```
5.56 x 45
```
Colour:
```
Black
```
Finish:
```
Anodized
```
Length:
```
16''
```
Style:
```
Complete
```
Weapon type:
```
AR-15
```
Delivery weight: 5.443kg
Shipping height: 305mm
Shipping width: 152mm
Shipping length: 914mm
UPC: 816341021952

Item details

Made in USA
US export classification: 0A501.e

Customers reviews

Customer ratings (0)

0 / 5

Variations:

ARAK-21 5.56X45 NATO COMPLETE UPPER RECEIVER - ARAK-21 5.56 NATO COMPLETE UPPER RECEIVER 16" MEDIUM BBL BLK

1489.9 GBP 0 £1,489.90 *

Backorderable

Cartridge: 5.56 x 45 Color: Black Finish: Anodized Length: 16'' Make: AR-15 Style: Complete Product no.: 430108199

Backorderable

1489.9 GBP 0 £1,489.90 *

ARAK-21 5.56X45 NATO COMPLETE UPPER RECEIVER - ARAK-21 5.56 NATO COMPLETE UPPER RCVR 12.5" MEDIUM BBL BLK

1409.9 GBP 0 £1,409.90 *

Backorderable

Cartridge: 5.56 x 45 Color: Black Finish: Anodized Length: 12.5'' Make: AR-15 Style: Complete Product no.: 430108200

Backorderable

1409.9 GBP 0 £1,409.90 *

Oops! Something went wrong.

We encountered an error while loading this content. Please refresh the page to continue. If the issue persists, contact our customer support.

Site Navigation

Product Categories

Ordering

Customer Service

Connect

Secure payment methods

Trade Associations

Welcome!

to Brownells UK, your destination for anything gun related. With our roots in a genuine passion for firearms, we bring you an unmatched selection of Gun Parts, Firearm Accessories, Gunsmithing Tools, Scopes & Red Dot Sights and Expert Knowledge.

Whether you're looking to maintain, repair, or upgrade, we've got what you need!

For Shooters, By Shooters
We share your enthusiasm and know exactly what you're looking for because we're part of the community.

Massive Selection
From the essentials to the unique, find everything under one roof.

Our blend of tradition and innovation
Shop with the convenience of modern technology, backed by a legacy of experience.

Browse our collection and discover why we're the trusted name in shooting sports & hunting.