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 THE DEVICE MANUFACTURING. MK3 DEVICE "LITE" AR-15 UPPER RECEIVER FIXTURE Support

The Mk3 DEVICE 'LITE' AR-15 Upper Receiver Fixture is lightweight, durable, and features a full-length 'T' slot for versatile M-LOK accessory compatibility.
-10 %

THE DEVICE MANUFACTURING. MK3 DEVICE "LITE" AR-15 UPPER RECEIVER FIXTURE

430102174

Top takeaways

  1. The Mk3 DEVICE "LITE" is a compact and lightweight upper receiver fixture for AR-15, made from machined 6061-T6 aluminum with a Type III hard coat anodized finish, weighing 1.7 pounds.
  2. It features a full-length "T" slot on the base compatible with M-LOK T-nuts, allowing for the attachment of M-LOK accessories or use as a jig for assembly and timing.
  3. Manufactured in the USA by THE DEVICE MANUFACTURING LLC, this fixture is designed for versatility and ease of use in gunsmithing and repair.

Attributes

  • Colour: 
    Black
  • Finish: 
    Anodized
  • Material: 
    Aircraft Aluminum
  • Weapon type: 
    AR-15
  • Delivery weight: 0.816kg
  • Shipping height: 89mm
  • Shipping width: 89mm
  • Shipping length: 229mm

Item details

Made in USA
  • Specifications:
  • Color: Black
  • Finish: Anodized
  • Make: AR-15
  • Material: Aircraft Aluminum
264.9 264.9 1 GBP
-10 %
MSRP £294.90
264.9 GBP £264.90

Prices inclusive of duty & VAT.

Product no.: 430102174

Mfr. No.: MK3 DEVICE "LIT

Mk3 DEVICE “LITE” Introducing the Mk3 DEVICE “LITE”. The Mk3 is the little brother to the Mk1 DEVICE Upper Receiver Fixture. The Mk3 retains the same operating principal of the Mk1 in a smaller, lighter leaner platform. The Mk3 weighs in at 1.7 pounds of machined 6061-T6 Aluminum with a Type III hard coat anodized finish. The Mk3 also features a full length “T” slot on the bases bottom compatible with M-LOK T-nuts. This feature can allow M-LOK accessories, such as Pic Rail sections, to be applied for scope set-up and repair. Or this “T” slot can be utilized as a set-up jig for assembly and timing of any M-LOK compatible accessories. The uses are limited only by the imagination. Proudly manufactured in the United States.
In stock More than 10 pieces in USA warehouse
Be the first to rate this product
1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £294.90
£264.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

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
264.9 264.9 1 GBP
Description Specification Customers reviews Accessories

THE DEVICE MANUFACTURING. MK3 DEVICE "LITE" AR-15 UPPER RECEIVER FIXTURE

-10 %
MSRP £294.90
264.9 GBP £264.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
-10 %
MSRP £294.90
£264.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+

Delivery time approx. 7-14 days.

100-Day Return Policy

Description:

Introducing the Mk3 DEVICE “LITE” – the perfect companion for your AR-15 upper receiver needs!

The Mk3 DEVICE “LITE” is the little brother to the Mk1 DEVICE Upper Receiver Fixture, designed for those who value both performance and portability.

Key Features:

  • Lightweight Design: Weighing in at just 1.7 pounds, the Mk3 is crafted from machined 6061-T6 Aluminum.
  • Durable Finish: Features a Type III hard coat anodized finish for enhanced durability.
  • Versatile Compatibility: Equipped with a full-length “T” slot on the base's bottom, compatible with M-LOK T-nuts.
  • Accessory Integration: Easily attach M-LOK accessories such as Pic Rail sections for scope set-up and repairs.
  • Creative Uses: The “T” slot can also serve as a set-up jig for assembly and timing of any M-LOK compatible accessories.

Whether you're a seasoned gunsmith or a hobbyist, the Mk3 DEVICE “LITE” opens up a world of possibilities limited only by your imagination. Proudly manufactured in the United States, this fixture is a must-have for anyone looking to enhance their AR-15 experience.



Top takeaways

  1. The Mk3 DEVICE "LITE" is a compact and lightweight upper receiver fixture for AR-15, made from machined 6061-T6 aluminum with a Type III hard coat anodized finish, weighing 1.7 pounds.
  2. It features a full-length "T" slot on the base compatible with M-LOK T-nuts, allowing for the attachment of M-LOK accessories or use as a jig for assembly and timing.
  3. Manufactured in the USA by THE DEVICE MANUFACTURING LLC, this fixture is designed for versatility and ease of use in gunsmithing and repair.

Attributes

  • Colour: 
    Black
  • Finish: 
    Anodized
  • Material: 
    Aircraft Aluminum
  • Weapon type: 
    AR-15
  • Delivery weight: 0.816kg
  • Shipping height: 89mm
  • Shipping width: 89mm
  • Shipping length: 229mm

Item details

Made in USA

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