My Account (Sign in)
Your basket is empty.
0
Basket
contact us by phone Help and contact
Free standard delivery over £199
100-day return policy
My Account (Sign in)
Shopping list
Your basket is empty. (0)
Basket
Newsletter 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

Home Rifle Parts Barrel Parts Rifle Barrels FAXON FIREARMS AR-15 6MM ARC BARRELS HEAVY PROFILE Support
Upgrade your AR-15 with the 20" 6mm ARC barrel from Faxon Firearms. 🔥 Durable, heavy profile with a 1-8 twist for peak performance!
  • FAXON FIREARMS 6MM ARC BARREL 20IN 1-8 5R RIFLE 5/8-24 BLK
  • FAXON FIREARMS 6MM ARC BARREL 20IN 1-8 5R RIFLE 5/8-24 BLK

FAXON FIREARMS AR-15 6MM ARC BARRELS HEAVY PROFILE - FAXON FIREARMS 6MM ARC BARREL 20IN 1-8 5R RIFLE 5/8-24 BLK

078000608

Variations:

Offer
Upgrade your AR-15 with the 20" 6mm ARC barrel from Faxon Firearms. 🔥 Durable, heavy profile with a 1-8 twist for peak performance!
FAXON FIREARMS 6MM ARC BARREL 20IN 1-8 5R RIFLE 5/8-24 BLK
251.7 GBP 0 £251.70 * £264.90
Gas System Length: Rifle Length: 20'' Product no.: 078000608
Not available - Is a 'Call to order' product.
251.7 GBP 0 £251.70 * £264.90
Ask question
-5 %
Upgrade your AR-15 with the Faxon 6mm ARC Barrel 🛠️. Heavy profile, 14.5" length, and black Nitride finish for superior performance!
FAXON FIREARMS 6MM ARC BARREL 14.5IN 1-8 5R CARBINE 5/8-28 BLK
237.4 GBP 0 £237.40 * £249.90
Gas System Length: Carbine Length: 14.5'' Product no.: 078000605
Not available - Is a 'Call to order' product.
237.4 GBP 0 £237.40 * £249.90
Ask question
Offer
Upgrade your AR-15 with the 6mm ARC barrel from Faxon Firearms! 🔥 Heavy profile, 16" length, and black Nitride finish for superior performance.
FAXON FIREARMS 6MM ARC BARREL 16IN 1-8 5R MID-LENGTH 5/8-24 BLK
261.2 GBP 0 £261.20 * £274.90
Gas System Length: Mid-Length Length: 16'' Product no.: 078000606
Not available - Is a 'Call to order' product.
261.2 GBP 0 £261.20 * £274.90
Ask question
Offer
Upgrade your AR-15 with the 18" 6mm ARC barrel from Faxon Firearms. 🔥 Heavy profile, black Nitride finish, and precision twist for superior performance!
FAXON FIREARMS 6MM ARC BARREL 18IN 1-8 5R MID-LENGTH 5/8-24 BLK
261.2 GBP 0 £261.20 * £274.90
Gas System Length: Mid-Length Length: 18'' Product no.: 078000607
Not available - Is a 'Call to order' product.
261.2 GBP 0 £261.20 * £274.90
Ask question
249.9 274.9 4 GBP
Sale
251.7 GBP £251.70 £264.90

Prices inclusive of duty & VAT.

Product no.: 078000608

Mfr. No.: BN15BARC8R20NHQ

To fully take advantage of the performance of the 6mm ARC cartridge Brownells has teamed up with Faxon to offer these AR-15 6mm ARC barrels. Made from 416R stainless steel and finished with a black Nitride finish, these come in a heavy profile with a 1-8 5R twist rate, and 5/8-24 muzzle threads. Available in four different lengths here are the associated specifications: 14.5” length with Carbine length gas system and 0.069” gas port diameter 16” length with Mid-Length gas system and 0.079” gas port diameter 18” length with Mid-Length gas system and 0.079” gas port diameter 20” length with Rifle length gas system and 0.085” gas port diameter Regardless of what barrel length you choose each barrel follows the same following specs: 1-8 5R twist .750” gas block diameter Heavy profile 5/8-24 muzzle threads 416R stainless steel Black Nitride finish
Not available - Is a 'Call to order' product.
Be the first to rate this product
Is a 'Call to order' product.
Wish List Ask question
Requires order by phone

Variations:

Offer
Upgrade your AR-15 with the 20" 6mm ARC barrel from Faxon Firearms. 🔥 Durable, heavy profile with a 1-8 twist for peak performance!
FAXON FIREARMS 6MM ARC BARREL 20IN 1-8 5R RIFLE 5/8-24 BLK
251.7 GBP 0 £251.70 * £264.90
Gas System Length: Rifle Length: 20'' Product no.: 078000608
Not available - Is a 'Call to order' product.
251.7 GBP 0 £251.70 * £264.90
Ask question
-5 %
Upgrade your AR-15 with the Faxon 6mm ARC Barrel 🛠️. Heavy profile, 14.5" length, and black Nitride finish for superior performance!
FAXON FIREARMS 6MM ARC BARREL 14.5IN 1-8 5R CARBINE 5/8-28 BLK
237.4 GBP 0 £237.40 * £249.90
Gas System Length: Carbine Length: 14.5'' Product no.: 078000605
Not available - Is a 'Call to order' product.
237.4 GBP 0 £237.40 * £249.90
Ask question
Offer
Upgrade your AR-15 with the 6mm ARC barrel from Faxon Firearms! 🔥 Heavy profile, 16" length, and black Nitride finish for superior performance.
FAXON FIREARMS 6MM ARC BARREL 16IN 1-8 5R MID-LENGTH 5/8-24 BLK
261.2 GBP 0 £261.20 * £274.90
Gas System Length: Mid-Length Length: 16'' Product no.: 078000606
Not available - Is a 'Call to order' product.
261.2 GBP 0 £261.20 * £274.90
Ask question
Offer
Upgrade your AR-15 with the 18" 6mm ARC barrel from Faxon Firearms. 🔥 Heavy profile, black Nitride finish, and precision twist for superior performance!
FAXON FIREARMS 6MM ARC BARREL 18IN 1-8 5R MID-LENGTH 5/8-24 BLK
261.2 GBP 0 £261.20 * £274.90
Gas System Length: Mid-Length Length: 18'' Product no.: 078000607
Not available - Is a 'Call to order' product.
261.2 GBP 0 £261.20 * £274.90
Ask question

Description:

To fully take advantage of the performance of the 6mm ARC cartridge Brownells has teamed up with Faxon to offer these AR-15 6mm ARC barrels. Made from 416R stainless steel and finished with a black Nitride finish, these come in a heavy profile with a 1-8 5R twist rate, and 5/8-24 muzzle threads. Available in four different lengths here are the associated specifications: 14.5” length with Carbine length gas system and 0.069” gas port diameter 16” length with Mid-Length gas system and 0.079” gas port diameter 18” length with Mid-Length gas system and 0.079” gas port diameter 20” length with Rifle length gas system and 0.085” gas port diameter Regardless of what barrel length you choose each barrel follows the same following specs: 1-8 5R twist .750” gas block diameter Heavy profile 5/8-24 muzzle threads 416R stainless steel Black Nitride finish

Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. Faxon Firearms AR-15 6mm ARC barrels are made from 416R stainless steel with a black Nitride finish and heavy profile.
  2. They feature a 1-8 5R twist rate and 5/8-24 muzzle threads, suitable for enhancing the performance of the 6mm ARC cartridge.
  3. The barrels come in various lengths with corresponding gas systems and port diameters, with the 20" version having a Rifle length gas system and 0.085” gas port diameter.

Attributes

  • Cartridge: 6 mm ARC
  • Contour: Heavy
  • Finish: Black
  • Gas System Length: Rifle
  • Length: 20''
  • Muzzle Threads: 5/8-24
  • Twist: 1-8
  • Weapon type: AR-15
  • Delivery weight: 1.152kg

Item details

Made in USA
US export classification: 0A501.c

Customers reviews

Customer ratings (0)

0 / 5

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

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.

Brownells Norge - Komplett utvalg av ladeutstyr, våpendeler, kuler, hylser, kikkerter, optikk og luftvåpen Brownells Österreich - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Switzerland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells Deutschland - Einer der größten Lieferanten für Waffenteile, Büchsenmacherzubehör & Schießsportzubehör Brownells France - Le plus grand fournisseur d'Accessoires pour le tir, Pièces détachées & Outils d'Armurier Brownells Iberica - El mayor proveedor de accesorios para el Tiro, Piezas y herramientas del armero. Brownells Sverige - Världens största leverantör av Vapendelar, Vapensmide Verktyg & Skyttetillbehör Brownells Suomi Brownells Italia - Il negozio del più grande rivenditore di componenti e accessori per armi da tiro, difesa e caccia Brownells Polska - Największy na świecie dostawca części broni, narzędzi rusznikarskich & akcesoriów strzeleckich Brownells Česko - Největší světový dodavatel součástí zbraní, střeleckého příslušenství a zbrojního nářadí
*
Prices inclusive of duty & VAT.

© 2025 Brownells UK
Part of the Brownells Europe Group

Logo Brownells
Classical viewClassical view Mobile viewMobile view
Back to top