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

Gunsmith Tools Rifle Tools Bench & Vise Blocks MIDWEST INDUSTRIES AR .308 LOWER RECEIVER BLOCK POLYMER Support

Constructed from high-strength polymer, this AR Lower Receiver Block allows for gas block roll pin installation and secure firearm maintenance with multiple assembly options.

MIDWEST INDUSTRIES AR .308 LOWER RECEIVER BLOCK POLYMER

812102033653 100043934

Filters:

Variations
Filters:
Variations:

Variations:

Constructed from high-strength polymer, this AR Lower Receiver Block allows for gas block roll pin installation and secure firearm maintenance with multiple assembly options.
AR .308 LOWER RECEIVER BLOCK POLYMER
69.9 GBP 0 £69.90 *
Backorderable
Color: Blue Finish: Blue Make: AR .308 Material: Polymer Product no.: 100043934
Backorderable
69.9 GBP 0 £69.90 *
-8 %
The Midwest Industries AR-15 Lower Receiver Block features high-strength polymer, allows gas block roll pin installation, and holds the complete firearm for maintenance.
AR-15 LOWER RECEIVER BLOCK POLYMER
59.9 GBP 105 £59.90 * £64.90 You save £5.00
In stock
Color: Blue Finish: Blue Make: AR-15 Material: Polymer Product no.: 100043933
In stock
59.9 GBP 105 £59.90 * £64.90
59.9 69.9 2 GBP
69.9 GBP £69.90

Prices inclusive of duty & VAT.

Product no.: 100043934

Mfr. No.: MI-LRB308

812102033653 Lower Receiver Blocks high strength polymer construction! AR-15 Lower Receiver Block Weight: 12 oz AR-15 Height: 6.5” Length: 5.0” Width: 1.25” AR .308 Lower Receiver Block Weight: 12.2 oz AR .308 Height: 6.5” Length: 5.0” Width: 1.25” Allows for gas block roll pin installation Mounting holes for attachment to bench or alternative work surface 4 points of contact for vice use Trigger guard installation section Allows lower to be held for multiple aspects of assembly Fire control pin assembly Able to hold complete firearm for maintenance Small parts tray 100% Made in USA
Backorderable
Be the first to rate this product
1
2
3
4
5
6
7
8
9
10+
£69.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

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

100-Day Return Policy

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.
Wish List Ask question
59.9 69.9 2 GBP
Description Specification Customers reviews Accessories

MIDWEST INDUSTRIES AR .308 LOWER RECEIVER BLOCK POLYMER

69.9 GBP £69.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
£69.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

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

100-Day Return Policy

Description:

Discover the ultimate solution for your AR build with our durable Lower Receiver Blocks!

The MIDWEST INDUSTRIES AR .308 Lower Receiver Block is crafted from high strength polymer, ensuring reliability and longevity in your firearms assembly process.

Specifications:

  • AR-15 Lower Receiver Block:
    • Weight: 12 oz
    • Height: 6.5”
    • Length: 5.0”
    • Width: 1.25”
  • AR .308 Lower Receiver Block:
    • Weight: 12.2 oz
    • Height: 6.5”
    • Length: 5.0”
    • Width: 1.25”

This innovative block allows for:

  • Gas block roll pin installation
  • Mounting holes for attachment to bench or alternative work surface
  • 4 points of contact for vice use
  • Trigger guard installation section
  • Multiple aspects of assembly to be held securely
  • Fire control pin assembly
  • Complete firearm maintenance
  • Small parts tray

100% Made in USA



Top takeaways

  1. Constructed from high-strength polymer, these Lower Receiver Blocks are designed specifically for AR-15 and AR .308 models, providing a stable platform for assembly and maintenance tasks.
  2. Features include multiple points of contact for vice use, a section for trigger guard installation, and a small parts tray, enhancing the ease of use for various gunsmithing procedures.
  3. The blocks are 100% made in the USA by MIDWEST INDUSTRIES, INC., and come with mounting holes for securing to a bench or work surface, ensuring a reliable and sturdy support for your firearm.

Attributes

  • Colour: 
    Blue
  • Finish: 
    Blue
  • Material: 
    Polymer
  • Weapon type: 
    AR .308
  • Delivery weight: 0.417kg
  • Shipping height: 51mm
  • Shipping width: 178mm
  • Shipping length: 267mm
  • UPC: 812102033653

Item details

Made in USA

Customers reviews

Customer ratings (0)

0 / 5

Variations:

Constructed from high-strength polymer, this AR Lower Receiver Block allows for gas block roll pin installation and secure firearm maintenance with multiple assembly options.
AR .308 LOWER RECEIVER BLOCK POLYMER
69.9 GBP 0 £69.90 *
Backorderable
Color: Blue Finish: Blue Make: AR .308 Material: Polymer Product no.: 100043934
Backorderable
69.9 GBP 0 £69.90 *
-8 %
The Midwest Industries AR-15 Lower Receiver Block features high-strength polymer, allows gas block roll pin installation, and holds the complete firearm for maintenance.
AR-15 LOWER RECEIVER BLOCK POLYMER
59.9 GBP 105 £59.90 * £64.90 You save £5.00
In stock
Color: Blue Finish: Blue Make: AR-15 Material: Polymer Product no.: 100043933
In stock
59.9 GBP 105 £59.90 * £64.90

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.

© 2026 Brownells UK
Part of the Brownells Europe Group

Logo Brownells
Classical viewClassical view Mobile viewMobile view
Back to top