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Combat Rails

Whatever your mission requires, BCM offers products ready for any american going in harm's way'.

Designed to the specification of combat end users, BCM Combat Rail Systems are built free float, for improved accuracy, with Aluminum alloys, that are light weight but do not compromise rigidity. Mission flexible platforms, ideal for end user customization in the placement of optics and accessories such as light mounts, vertical grips, hand stops, lasers and bi-pods; BCM Combat Rail Systems are available in three interface systems:

  • Keymod™
  • M-LOK®
  • 1913 Picatinny Rail

KMR-A Keymod™ Systems

The BCM® KeyMod Rail(KMR-Alpha) delivers a robust, ultra-light modular handguard for the AR platform, second to none on the market today.

Manufactured from Aircraft Grade Aluminum alloy, the KMR-A gives end users an extensive range of customization options, with seven KeyMod lined mounting surfaces and one with baked in MIL-STD-1913 at the 12 O’Clock position. The KMR-A features ergonomics tailored to combat end user requirements, with its reduced profile maximized for positive control of the weapon system in the lightest possible package.

MCMR M-LOK Compatible Modular Rail System

The BCM® M-LOK®* Compatible Modular Rail” (MCMR) delivers the same optimized ergonomic profile and lock up developed for the KMR-Alpha rail system, but with an M-LOK® compatible interface. Precision Machined Aerospace 6061-T6 Aluminum Alloy, the MCMR is both rigid and light-weight, featuring mounting interfaces on seven sides in addition to the baked in MIL-STD-1913 at the 12 O’Clock position.

This enhanced rigidity aids accuracy by limiting barrel deflection from external loads such as a bipod or vertical grip. Also prevents unwanted deflection of moving components, reducing the chance for premature damage and wear of the bolt and barrel lugs which results from misalignment.

QRF Quad Rail Free Float System

A MIL-STD-1913 rail, the BCM® QRF(Quad Rail Free Float) Rail System is built with Picatinny Rails running the full length of the handguard at 12, 3, 6 and 9 O’Clock. Precision machined from high-strength lightweight Aerospace 6061-T6 Aluminum Alloy, the BCM QRF features the same lock up and steel barrel nut insuring the rail resists movement even under extreme use.

The QRF provides end users an uninterrupted mounting surface at 12 O’Clock when mated with a BCM or other Mil-Spec upper receiver, allowing for the fine tuned positioning of optics, lasers or other accessories potentially vital to mission success.

Combat Rail Lock Up

The entire BCM® Combat Rail System fleet uses our patented(US Patent 8904691) lock up system where self-locking cross bolts apply force at the 12:00 position of the handguard equally distributing force around the surface area of the rail. This insures continuous top center alignment of the rail and mitigates forwards/backwards movement of the handguard when the weapon system is fired.

Made in America

All BCM® components and accessories unite state of the art manufacturing with lightweight and durable materials to ensure components that last a lifetime, performing far beyond performance requirements established nearly six decades ago.

*M-LOK® is a registered trademark of Magpul Industries Corp. https://www.magpul.com/ip

Combat Rail Systems

MK2 Upper Receiver. Aligned. Unbending.
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Meet the new war

Designed to the specification of combat end users, BCM Combat Rail Systems are built free float, for improved accuracy, with Aluminum alloys, that are light weight but do not compromise rigidity. Mission flexible platforms, ideal for end user customization in the placement of optics and accessories such as light mounts, vertical grips, hand stops, lasers and bi-pods; BCM Combat Rail Systems are available in three interface systems:

  • Keymod™
  • M-LOK®
  • 1913 Picatinny Rail

KMR Alpha Keymod Systems

The BCM® KeyMod Rail(KMR-Alpha) delivers a robust, ultra-light modular handguard for the AR platform, second to none on the market today.

Manufactured from Aircraft Grade Aluminum alloy, the KMR-A gives end users an extensive range of customization options, with seven KeyMod lined mounting surfaces and one with baked in MIL-STD-1913 at the 12 O’Clock position. The KMR-A features ergonomics tailored to combat end user requirements, with its reduced profile maximized for positive control of the weapon system in the lightest possible package.

Meet the new war

The BCM® M-LOK®* Compatible Modular Rail” (MCMR) delivers the same optimized ergonomic profile and lock up developed for the KMR-Alpha rail system, but with an M-LOK® compatible interface. Precision Machined Aerospace 6061-T6 Aluminum Alloy, the MCMR is both rigid and light-weight, featuring mounting interfaces on seven sides in addition to the baked in MIL-STD-1913 at the 12 O’Clock position.

This enhanced rigidity aids accuracy by limiting barrel deflection from external loads such as a bipod or vertical grip. Also prevents unwanted deflection of moving components, reducing the chance for premature damage and wear of the bolt and barrel lugs which results from misalignment.

Meet the new war

A MIL-STD-1913 rail, the BCM® QRF (Quad Rail Free Float) Rail System is built with Picatinny Rails running the full length of the handguard at 12, 3, 6 and 9 O’Clock. Precision machined from high-strength lightweight Aerospace 6061-T6 Aluminum Alloy, the BCM QRF features the same lock up and steel barrel nut insuring the rail resists movement even under extreme use.

The QRF provides end users an uninterrupted mounting surface at 12 O’Clock when mated with a BCM or other Mil-Spec upper receiver, allowing for the fine tuned positioning of optics, lasers or other accessories potentially vital to mission success.

Combat Rail Lock Up

The entire BCM® Combat Rail System fleet uses our patented(US Patent 8904691) lock up system where self-locking cross bolts apply force at the 12:00 position of the handguard equally distributing force around the surface area of the rail. This insures continuous top center alignment of the rail and mitigates forwards/backwards movement of the handguard when the weapon system is fired.

Combat Rail Lock Up

All BCM® Combat Rail Systems and accessories unite state of the art manufacturing with lightweight and durable materials to ensure components that last a lifetime, performing far beyond performance requirements established nearly six decades ago. Like all BCM rifles and BCM® accessories, all BCM Combat Rail Systems are made in the USA.

*M-LOK® is a registered trademark of Magpul Industries Corp. https://www.magpul.com/ip