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 BROWNELLS BRN AR-15/M16A1 RETRO CARBINE 5.56MM 12.7" 1-7 BBL ASSEMBLY Support

The Brownell's Retro A1 12.7" carbine barrel assembly features a chrome lined 5.56mm barrel, available with 1-7" or 1-12" rifling, perfect for your Retro Rifle build.

BROWNELLS BRN AR-15/M16A1 RETRO CARBINE 5.56MM 12.7" 1-7 BBL ASSEMBLY

050806003781 078000462

Filters:

Variations
Filters:
Variations:

Variations:

The Brownell's Retro A1 12.7" carbine barrel assembly features a chrome lined 5.56mm barrel, available with 1-7" or 1-12" rifling, perfect for your Retro Rifle build.
AR-15 12.7" A1 CARBINE BARREL ASSEMBLY - BRN AR-15/M16A1 RETRO CARBINE 5.56MM 12.7" 1-7 BBL ASSEMBLY
274.9 GBP 27 £274.90 *
In stock
Cartridge: 5.56 mm NATO Finish: Black Gas System Length: Carbine Length: 12.7'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 078000462
In stock
274.9 GBP 27 £274.90 *
Discover the Brownell’s Retro A1 12.7" carbine barrel assembly, featuring chrome lining, 1-12" twist, and complete with essential components for your Retro Rifle build.
AR-15 12.7" A1 CARBINE BARREL ASSEMBLY - BRN AR-15/A1 CARBINE 5.56MM 12.7" 1-12 TWIST BARREL ASSEMBLY
279.9 GBP 17 £279.90 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Gas System Length: Carbine Length: 12.7'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-12 Product no.: 100020996
Not available
279.9 GBP 17 £279.90 *
274.9 279.9 2 GBP
274.9 GBP £274.90

Prices inclusive of duty & VAT.

Product no.: 078000462

Mfr. No.: BABR557462M

050806003781 Introducing the Brownell’s Retro A1 12.7" carbine length barrel assembly. Chambered in 5.56x45mm NATO, the chrome lined barrel is available with your choice of 1-7" or 1-12" rifling and finished in black phosphate with an overall length of 12.7”. Muzzle threads are ½""-28, and in back there's a standard barrel extension. Each Retro A1 12.7" carbine barrel assembly includes a front-sight base, .625", no F marks, complete with sight post, detent, spring, sling swivel, rivet, flat Delta ring, barrel nut, weld spring, snap ring, and round handguard cap installed. Machined from 4150 chrome moly steel. The barrel you need for your next Retro Rifle build!
In stock More than 10 pieces in USA warehouse
Be the first to rate this product

Delivery time approx. 7-14 days.

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
274.9 279.9 2 GBP
Description Specification Customers reviews Accessories

BROWNELLS BRN AR-15/M16A1 RETRO CARBINE 5.56MM 12.7" 1-7 BBL ASSEMBLY

274.9 GBP £274.90

Prices inclusive of duty & VAT.

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

Description:

Discover the Brownell’s Retro A1 12.7" Carbine Barrel Assembly!

Introducing the Brownell’s Retro A1 12.7" carbine length barrel assembly. Chambered in 5.56x45mm NATO, this chrome lined barrel offers exceptional performance and reliability.

Key Features:

  • Barrel Length: 12.7”
  • Twist Rate: Available in 1-7" or 1-12" rifling
  • Finish: Black phosphate
  • Muzzle Threads: ½"-28
  • Barrel Extension: Standard

Each Retro A1 12.7" carbine barrel assembly includes:

  • Front-sight base
  • .625" diameter
  • No F marks
  • Complete with sight post, detent, spring
  • Sling swivel, rivet, flat Delta ring
  • Barrel nut, weld spring, snap ring
  • Round handguard cap installed

Machined from 4150 chrome moly steel, this barrel is the perfect choice for your next Retro Rifle build!



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The Brownell’s Retro A1 12.7" carbine length barrel is chambered in 5.56x45mm NATO and has a chrome-lined barrel with a black phosphate finish.
  2. Available with a 1-7" or 1-12" rifling twist, it features a 12.7” length, ½"-28 muzzle threads, and comes with a front-sight base and other necessary components installed.
  3. Constructed from 4150 chrome moly steel, the barrel assembly is designed for AR-15 builds and includes a carbine length gas system.

Attributes

  • Cartridge: 
    5.56 mm NATO
  • Finish: 
    Black
  • Gas System Length: 
    Carbine
  • Length: 
    12.7''
  • Muzzle Threads: 
    1/2-28
  • Twist: 
    1-7
  • Weapon type: 
    AR-15
  • Delivery weight: 0.454kg
  • Shipping height: 25mm
  • Shipping width: 25mm
  • Shipping length: 25mm
  • UPC: 050806003781

Item details

Made in USA
US export classification: 0A501.c

Customers reviews

Customer ratings (0)

0 / 5

Variations:

The Brownell's Retro A1 12.7" carbine barrel assembly features a chrome lined 5.56mm barrel, available with 1-7" or 1-12" rifling, perfect for your Retro Rifle build.
AR-15 12.7" A1 CARBINE BARREL ASSEMBLY - BRN AR-15/M16A1 RETRO CARBINE 5.56MM 12.7" 1-7 BBL ASSEMBLY
274.9 GBP 27 £274.90 *
In stock
Cartridge: 5.56 mm NATO Finish: Black Gas System Length: Carbine Length: 12.7'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-7 Product no.: 078000462
In stock
274.9 GBP 27 £274.90 *
Discover the Brownell’s Retro A1 12.7" carbine barrel assembly, featuring chrome lining, 1-12" twist, and complete with essential components for your Retro Rifle build.
AR-15 12.7" A1 CARBINE BARREL ASSEMBLY - BRN AR-15/A1 CARBINE 5.56MM 12.7" 1-12 TWIST BARREL ASSEMBLY
279.9 GBP 17 £279.90 *
Not available
Cartridge: 5.56 mm NATO Finish: Black Gas System Length: Carbine Length: 12.7'' Make: AR-15 Muzzle Threads: 1/2-28 Twist: 1-12 Product no.: 100020996
Not available
279.9 GBP 17 £279.90 *

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