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 Forend & Handguard Parts Handguard & Rail Accessories Accessory Rails MAGPUL M-LOK RAIL 7-SLOT PICATINNY 3.125" ALUMINUM FOR AR-15 BLACK Support

Attach Picatinny accessories easily with the Magpul M-LOK Rail, crafted from durable aluminum or polymer, featuring beveled ends for safety and compatibility with all M-LOK handguards.
Offer

MAGPUL M-LOK RAIL 7-SLOT PICATINNY 3.125" ALUMINUM FOR AR-15 BLACK

873750001678 100015359

Filters:

Variations
Filters:
Variations:

Variations:

Offer
Attach Picatinny accessories easily with the Magpul M-LOK Rail, crafted from durable aluminum or polymer, featuring beveled ends for safety and compatibility with all M-LOK handguards.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 7-SLOT PICATINNY 3.125" ALUMINUM FOR AR-15 BLACK
25.9 GBP 31 £25.90 * £26.90
In stock
Color: Black Length: 3-1/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015359
In stock
25.9 GBP 31 £25.90 * £26.90
Offer
The MAGPUL M-LOK Rail allows secure attachment of Picatinny accessories to M-LOK handguards, crafted from durable aluminum or polymer for enhanced performance.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 5-SLOT PICATINNY 2.375"ALUMINUM FOR AR-15 BLACK
23.9 GBP 7 £23.90 * £24.90
In stock
Color: Black Length: 2-3/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015358
In stock
23.9 GBP 7 £23.90 * £24.90
Offer
Enhance your AR-15 with the MAGPUL M-LOK Rail, allowing secure attachment of Picatinny accessories, featuring durable aluminum construction and beveled edges.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 9-SLOT PICATINNY 3.875" ALUMINUM FOR AR-15 BLACK
26.9 GBP 92 £26.90 * £27.90
In stock
Color: Black Length: 3-7/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015360
In stock
26.9 GBP 92 £26.90 * £27.90
Enhance your AR-15 with MAGPUL's durable aluminum M-LOK rail, allowing easy attachment of Picatinny accessories for improved versatility and performance.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 3-SLOT PICATINNY 1.5" ALUMINUM FOR AR-15 BLACK
22.9 GBP 0 £22.90 *
Backorderable
Color: Black Length: 1.5 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015357
Backorderable
22.9 GBP 0 £22.90 *
22.9 26.9 4 GBP
Offer
MSRP £26.90
25.9 GBP £25.90

Prices inclusive of duty & VAT.

Product no.: 100015359

Mfr. No.: MAG582-BLK

873750001678 Compatible with all M-LOK handguards and forends, these rail sections allow you to attach 1913 Picatinny rail-mounted accessories to your weapon. Rail sections are available in either aluminum or polymer. Aluminum sections are machined from Mil-Spec anodized aluminum. Lightweight polymer sections are injection molded from a proprietary reinforced composite for enhanced strength and durability. Both aluminum and polymer rail sections feature beveled ends to eliminate sharp corners and edges, plus reduce snagging. Includes all necessary hardware for attaching rails to M-LOK slots on aluminum or polymer handguards and forends.
In stock More than 10 pieces in USA warehouse
5/5 - 1 Customers
1
2
3
4
5
6
7
8
9
10+
Offer
MSRP £26.90
£25.90

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
22.9 26.9 4 GBP
Description Specification Customers reviews Accessories

MAGPUL M-LOK RAIL 7-SLOT PICATINNY 3.125" ALUMINUM FOR AR-15 BLACK

Offer
MSRP £26.90
25.9 GBP £25.90

Prices inclusive of duty & VAT.

1
2
3
4
5
6
7
8
9
10+
Offer
MSRP £26.90
£25.90

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:

Enhance Your AR-15 with Precision Rail Attachments

Introducing the AR-15 PICATINNY M-LOK RAIL ALUMINUM from MAGPUL, designed to seamlessly integrate with your M-LOK handguards and forends.

Product Description

Compatible with all M-LOK handguards and forends, these rail sections allow you to attach 1913 Picatinny rail-mounted accessories to your weapon. Available in either aluminum or polymer, these rail sections are crafted to meet the demands of serious shooters.

  • Material Options: Choose between lightweight, durable aluminum or robust polymer.
  • Aluminum Sections: Machined from Mil-Spec anodized aluminum for maximum strength.
  • Polymer Sections: Injection molded from a proprietary reinforced composite, enhancing strength and durability.
  • Beveled Ends: Both aluminum and polymer rail sections feature beveled ends to eliminate sharp corners and edges, reducing snagging.

Each package includes all necessary hardware for attaching rails to M-LOK slots on aluminum or polymer handguards and forends.

Specifications

  • Material: Aluminum or polymer, matte black finish.
  • Available Sizes:
    • 3 Slots – 1-1/2" (3.8cm) OAL
    • 5 Slots – 2-3/8" (6cm) OAL
    • 7 Slots – 3-1/8" (7.9cm) OAL
    • 9 Slots – 3-7/8" (9.8cm) OAL

Upgrade your firearm today with the MAGPUL M-LOK Rail and experience the difference in performance and versatility!



Top takeaways

  1. Compatible with all M-LOK systems, the rail sections allow for the attachment of 1913 Picatinny accessories.
  2. Available in both aluminum and polymer, with aluminum being Mil-Spec anodized for durability.
  3. Designed with beveled ends to prevent snagging and sharp edges, and comes with necessary hardware for installation.

Attributes

  • Colour: 
    Black
  • Length: 
    3-1/8 in
  • Material: 
    Aluminum
  • Style: 
    Picatinny
  • Type: 
    M-LOK
  • Weapon type: 
    AR-15
  • Delivery weight: 0.032kg
  • Shipping height: 25mm
  • Shipping width: 83mm
  • Shipping length: 222mm
  • UPC: 873750001678

Item details

Made in USA

Customers reviews

Customer ratings (1)

5 / 5
Definitely recommended

Brownells USA It works as advertised 30/06/2016

Solid lock up, a little hard to put on, but stable on poly handguards.

Variations:

Offer
Attach Picatinny accessories easily with the Magpul M-LOK Rail, crafted from durable aluminum or polymer, featuring beveled ends for safety and compatibility with all M-LOK handguards.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 7-SLOT PICATINNY 3.125" ALUMINUM FOR AR-15 BLACK
25.9 GBP 31 £25.90 * £26.90
In stock
Color: Black Length: 3-1/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015359
In stock
25.9 GBP 31 £25.90 * £26.90
Offer
The MAGPUL M-LOK Rail allows secure attachment of Picatinny accessories to M-LOK handguards, crafted from durable aluminum or polymer for enhanced performance.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 5-SLOT PICATINNY 2.375"ALUMINUM FOR AR-15 BLACK
23.9 GBP 7 £23.90 * £24.90
In stock
Color: Black Length: 2-3/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015358
In stock
23.9 GBP 7 £23.90 * £24.90
Offer
Enhance your AR-15 with the MAGPUL M-LOK Rail, allowing secure attachment of Picatinny accessories, featuring durable aluminum construction and beveled edges.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 9-SLOT PICATINNY 3.875" ALUMINUM FOR AR-15 BLACK
26.9 GBP 92 £26.90 * £27.90
In stock
Color: Black Length: 3-7/8 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015360
In stock
26.9 GBP 92 £26.90 * £27.90
Enhance your AR-15 with MAGPUL's durable aluminum M-LOK rail, allowing easy attachment of Picatinny accessories for improved versatility and performance.
AR-15 PICATINNY M-LOK RAIL ALUMINUM - M-LOK RAIL 3-SLOT PICATINNY 1.5" ALUMINUM FOR AR-15 BLACK
22.9 GBP 0 £22.90 *
Backorderable
Color: Black Length: 1.5 in Make: AR-15 Material: Aluminum Style: Picatinny Type: M-LOK Product no.: 100015357
Backorderable
22.9 GBP 0 £22.90 *

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