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 Gas System Parts Gas Blocks BROWNELLS BRN AR-15 MODULAR GAS BLOCK, 0.750" Support

The Brownells AR-15 Modular Gas Block Kit offers customizable rail options, easy installation, and robust construction for enhanced tactical versatility.

BROWNELLS BRN AR-15 MODULAR GAS BLOCK, 0.750"

050806107755 080000382

Filters:

Variations
Filters:
Variations:

Variations:

The Brownells AR-15 Modular Gas Block Kit offers customizable rail options, easy installation, and robust construction for enhanced tactical versatility.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK, 0.750"
41.9 GBP 10 £41.90 *
In stock
Inside Diameter: .750 Make: AR-15 Material: Aluminum Style: Picatinny Product no.: 080000382
In stock
41.9 GBP 10 £41.90 *
The Brownells AR-15 Modular Gas Block Kit offers customizable Picatinny rails, rugged 6061 aluminum construction, and easy installation for tactical versatility.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK RAIL
21.9 GBP 3 £21.90 *
In stock
Make: AR-15 Material: Aluminum Model: AR-15 Style: Picatinny Product no.: 080000383
In stock
21.9 GBP 3 £21.90 *
The BROWNELLS AR-15 Modular Gas Block Kit offers easy installation, customizable Picatinny rails, and robust 6061 aluminum construction for superior strength.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK KIT WITH RAIL, 0.750"
79.9 GBP 0 £79.90 *
Backorderable
Inside Diameter: .750 Make: AR-15 Material: Aluminum Style: Picatinny Product no.: 080000384
Backorderable
79.9 GBP 0 £79.90 *
21.9 79.9 3 GBP
41.9 GBP £41.90

Prices inclusive of duty & VAT.

Product no.: 080000382

050806107755 Easy-to-install gas block features an integral fixed rail and a modular design that allows fast installation and removal of up to three, additional Picatinny rails for mounting lasers, lights, night vision optics, back-up sights, and a variety of other tactical accessories. Side and bottom rails attach easily with two screws, so you can configure the unit for each mission’s requirements. Precision-machined from rugged, 6061 billet aluminum for superior strength without weighing down your weapon. Mounts securely to barrel with three, hardened steel setscrews.
In stock More than 10 pieces in USA warehouse
3.2/5 - 10 Customers

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
21.9 79.9 3 GBP
Description Specification Customers reviews Accessories

BROWNELLS BRN AR-15 MODULAR GAS BLOCK, 0.750"

41.9 GBP £41.90

Prices inclusive of duty & VAT.

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

Description:

Enhance your AR-15 with the ultimate modular gas block kit!

The AR-15 Gas Block Kit Modular from BROWNELLS offers a unique, modular design for ultimate customization. This easy-to-install gas block features an integral fixed rail and a versatile design that allows for the fast installation and removal of up to three additional Picatinny rails.

Key Features:

  • Allows mounting of lasers, lights, night vision optics, back-up sights, and a variety of tactical accessories.
  • Side and bottom rails attach easily with just two screws, enabling you to configure the unit for each mission’s requirements.
  • Precision-machined from rugged 6061 billet aluminum for superior strength without adding unnecessary weight to your weapon.
  • Secures to the barrel with three hardened steel setscrews for a reliable fit.

Specifications:

  • Material: Aluminum with a matte black, hardcoat anodized finish.
  • Fits standard .750" (19mm) diameter barrels.
  • Gas Block Dimensions: 1-7/8" (4.8cm) long, 1" (2.5cm) wide, 1-7/16" (3.6cm) high.
  • Gas Block Kit includes modular gas block with three add-on rails.
  • Add-on Rail Dimensions: 1-7/8" long, 2-7/64" (5.3cm) wide, 2" (5.0cm) tall.

Upgrade your AR-15 with the BROWNELLS BRN AR-15 Modular Gas Block for unmatched flexibility and performance!



Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The BROWNELLS AR-15 Modular Gas Block Kit features an integral fixed rail and a modular design for easy attachment of up to three Picatinny rails.
  2. Constructed from 6061 billet aluminum for durability without adding significant weight to the weapon.
  3. Mounts to .750" diameter barrels with three hardened steel setscrews for a secure installation.

Attributes

  • Inside Diameter: 
    .750
  • Material: 
    Aluminum
  • Model: -
  • Style: 
    Picatinny
  • Weapon type: 
    AR-15
  • Delivery weight: 0.045kg
  • Shipping height: 30mm
  • Shipping width: 74mm
  • Shipping length: 130mm
  • UPC: 050806107755

Item details

Made in USA
US export classification: 0A501.x

Customers reviews

Customer ratings (10)

3.2 / 5
Definitely recommended

Brownells USA gas block - Bayonet Lug. 28/02/2017

we got in the gas block - bayonet lug. went on great - fast, with a AR 15 roll pin starter. add 2 small drops of blue lock tight on all 2 or 4 Alin screws, to be safe!



Slightly recommend

Brownells USA Great design, terrible material choice 21/02/2016

I purchased this kit for an upper build I was doing as a gift for a friend. The design is fantastic in its versatility but the choice of a low grade and strength aluminum (6061 or 2024) as the manufacturing material was wrong considering the limited length of threaded holes for both clamping to the barrel and attaching the picatinny rail sections. Both the clamping set screws and the screws for attaching rail sections stripped out without any effort and upon examining the screws for the rail sections the screws were only holding on 1-1/2 to 2 complete turns of the thread. Standard manufacturing practice is that when putting a screw into aluminum of any grade you must go twice the diameter of the screw in number of threads to properly hold.



As previously stated this is a fantastic design but would be better off if manufactured out of steel or titanium.

Variations:

The Brownells AR-15 Modular Gas Block Kit offers customizable rail options, easy installation, and robust construction for enhanced tactical versatility.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK, 0.750"
41.9 GBP 10 £41.90 *
In stock
Inside Diameter: .750 Make: AR-15 Material: Aluminum Style: Picatinny Product no.: 080000382
In stock
41.9 GBP 10 £41.90 *
The Brownells AR-15 Modular Gas Block Kit offers customizable Picatinny rails, rugged 6061 aluminum construction, and easy installation for tactical versatility.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK RAIL
21.9 GBP 3 £21.90 *
In stock
Make: AR-15 Material: Aluminum Model: AR-15 Style: Picatinny Product no.: 080000383
In stock
21.9 GBP 3 £21.90 *
The BROWNELLS AR-15 Modular Gas Block Kit offers easy installation, customizable Picatinny rails, and robust 6061 aluminum construction for superior strength.
AR-15 GAS BLOCK KIT MODULAR - BRN AR-15 MODULAR GAS BLOCK KIT WITH RAIL, 0.750"
79.9 GBP 0 £79.90 *
Backorderable
Inside Diameter: .750 Make: AR-15 Material: Aluminum Style: Picatinny Product no.: 080000384
Backorderable
79.9 GBP 0 £79.90 *

Customers also bought

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