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)
Wish 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

Rifle Parts Barrel Parts Rifle Barrels CRITERION BARRELS INC AR-15 BARREL, 20", FLUTED, RIFLE-LENGTH, STAINLESS STEEL Support

Enhance your rifle with Criterion's 20" fluted AR-15 barrel, offering reduced weight, maximum concentricity, and compatibility with .223 Wylde and 5.56 NATO.

CRITERION BARRELS INC AR-15 BARREL, 20", FLUTED, RIFLE-LENGTH, STAINLESS STEEL

100019285

Filters:

Variations
Filters:
Variations:

Variations:

Enhance your rifle with Criterion's 20" fluted AR-15 barrel, offering reduced weight, maximum concentricity, and compatibility with .223 Wylde and 5.56 NATO.
AR-15 BARRELS, FLUTED, STAINLESS STEEL, RIFLE-LENGTH - AR-15 BARREL, 20", FLUTED, RIFLE-LENGTH, STAINLESS STEEL
529.9 GBP 0 £529.90 *
Not available
Barrel Weight: 2.25 lbs Cartridge: 223 Remington, 5.56 mm NATO, 223 Wylde Finish: Stainless Steel Gas System Length: Rifle Length: 20'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-8 Product no.: 100019285
Not available
529.9 GBP 0 £529.90 *
Criterion fluted AR-15 barrels offer reduced weight, enhanced velocity, and precision with a .223 Wylde chamber, M4 extension, and durable 416R stainless steel.
AR-15 BARRELS, FLUTED, STAINLESS STEEL, RIFLE-LENGTH - AR-15 BARREL, 18", FLUTED, RIFLE-LENGTH, STAINLESS STEEL
529.9 GBP 0 £529.90 *
Not available
Barrel Weight: 2.15 lbs Cartridge: 223 Remington, 5.56 mm NATO, 223 Wylde Finish: Stainless Steel Gas System Length: Rifle Length: 18'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-8 Product no.: 100019284
Not available
529.9 GBP 0 £529.90 *
529.9 529.9 2 GBP
529.9 GBP £529.90

Prices inclusive of duty & VAT.

Product no.: 100019285

Mfr. No.: 1520S-FL12

When the added velocity of a longer barrel needs to be preserved, but the desire for additional weight reduction remains, barrel fluting serves as an excellent solution to help shave away unwanted bulk. Criterion fluted AR-15 barrels are designed to ensure maximum concentricity and consistent dimensions throughout the full length of the bore. Eight flutes are machined around the circumference of the barrel to the front and rear of the gas port. Each flute is polished to smooth jagged edges while retaining a sharp appearance. Each 416R stainless steel barrel comes complete with an M4 barrel extension and a .223 Wylde chamber designed to accept both .223 Remington and 5.56 NATO cartridges.
Not available
5/5 - 2 Customers

Not available.

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.
Wish List Ask question
order by phone
529.9 529.9 2 GBP
Description Specification Customers reviews Accessories

CRITERION BARRELS INC AR-15 BARREL, 20", FLUTED, RIFLE-LENGTH, STAINLESS STEEL

529.9 GBP £529.90

Prices inclusive of duty & VAT.

Is a 'Call to order' product.
Requires order by phone

Description:

Enhance Your AR-15 with Criterion Fluted Barrels

When the added velocity of a longer barrel needs to be preserved, but the desire for additional weight reduction remains, barrel fluting serves as an excellent solution to help shave away unwanted bulk. Criterion fluted AR-15 barrels are designed to ensure maximum concentricity and consistent dimensions throughout the full length of the bore.

Key Features:

  • Length: Available in 18 or 20 inches
  • Profile: Fluted
  • Gas System: Rifle (18” & 20”)
  • Chamber: .223 Wylde, designed to accept both .223 Remington and 5.56 NATO cartridges
  • Finish: Stainless Steel
  • Construction: 416R Stainless Steel, hand lapped
  • Includes barrel extension with M4 feedramps
  • Dimensions: .750” OD at the gas port
  • Threads: ½-28

Eight flutes are machined around the circumference of the barrel to the front and rear of the gas port. Each flute is polished to smooth jagged edges while retaining a sharp appearance. Each 416R stainless steel barrel comes complete with an M4 barrel extension and a .223 Wylde chamber designed to accept both .223 Remington and 5.56 NATO cartridges.



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. Criterion fluted AR-15 barrels provide weight reduction while maintaining barrel velocity, featuring eight machined flutes for balance between aesthetics and function.
  2. The barrels are constructed from 416R stainless steel, ensuring concentricity and dimensional consistency, and are equipped with a .223 Wylde chamber to accommodate both .223 Remington and 5.56 NATO rounds.
  3. Each barrel includes an M4 barrel extension, has a 1-8 twist rate, and is designed with a rifle-length gas system and 1/2-28 muzzle threads for compatibility with various rifle setups.

Attributes

  • Barrel Weight: 
    2.25 lbs
  • Cartridge: 
    223 Remington
    , 
    223 Wylde
    , 
    5.56 mm NATO
  • Finish: 
    Stainless Steel
  • Gas System Length: 
    Rifle
  • Length: 
    20''
  • Muzzle Threads: 
    1/2-28
  • Twist: 
    1-8
  • Weapon type: 
    AR-15
  • Delivery weight: 1.061kg
  • Shipping height: 25mm
  • Shipping width: 25mm
  • Shipping length: 610mm

Item details

Made in USA
US export classification: 0A501.c

Customers reviews

Customer ratings (2)

5 / 5
Definitely recommended

Brownells USA 20 inch criterion 31/07/2017

I bought an ar15 in November started reloading in February I never had good accuracy with the gun until I put this barrel on now everything that I put through it shoots between 1/2 inch - 3/4 inch 5 shot groups @ 100 yards I've never given a review before but feel compelled to give Criterion a big thumbs up. Good job and thanks

Definitely recommended

Brownells USA very high quality 13/09/2016

I bought this barrel for my second AR build. The fit and finish was of the highest quality that I have seen. All the threads and surfaces where very smooth with no burs of any kind. Everything went together without any issues at all.

Variations:

Enhance your rifle with Criterion's 20" fluted AR-15 barrel, offering reduced weight, maximum concentricity, and compatibility with .223 Wylde and 5.56 NATO.
AR-15 BARRELS, FLUTED, STAINLESS STEEL, RIFLE-LENGTH - AR-15 BARREL, 20", FLUTED, RIFLE-LENGTH, STAINLESS STEEL
529.9 GBP 0 £529.90 *
Not available
Barrel Weight: 2.25 lbs Cartridge: 223 Remington, 5.56 mm NATO, 223 Wylde Finish: Stainless Steel Gas System Length: Rifle Length: 20'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-8 Product no.: 100019285
Not available
529.9 GBP 0 £529.90 *
Criterion fluted AR-15 barrels offer reduced weight, enhanced velocity, and precision with a .223 Wylde chamber, M4 extension, and durable 416R stainless steel.
AR-15 BARRELS, FLUTED, STAINLESS STEEL, RIFLE-LENGTH - AR-15 BARREL, 18", FLUTED, RIFLE-LENGTH, STAINLESS STEEL
529.9 GBP 0 £529.90 *
Not available
Barrel Weight: 2.15 lbs Cartridge: 223 Remington, 5.56 mm NATO, 223 Wylde Finish: Stainless Steel Gas System Length: Rifle Length: 18'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-8 Product no.: 100019284
Not available
529.9 GBP 0 £529.90 *

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

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