Mi Handguard CRM M-LOK 13.375" Combat Rail for AR-15

The Midwest Industries Combat M-LOK handguard is a free-float AR-15 handguard built for shooters who want serious modularity without sacrificing rigidity. At 13.375 inches, this rail strikes a practical balance for mid-length builds—long enough to mount optics, lights, and supports forward, compact enough to keep your rifle nimble. The fully free-floated design isolates the barrel from vibration, which means your accuracy potential improves and shot-to-shot consistency gets better whether you're running precision loads at the range or pushing distance on hunting trips.

The aluminum construction is machined entirely in the USA and delivers the durability you'd expect from a working rifle accessory. Seven rows of M-LOK slots run the length of the handguard, giving you genuine flexibility to place your gear exactly where you need it—no pre-drilled holes forcing compromises. The top features a continuous Picatinny rail section for mounting an optic or backup sight without eating into your M-LOK real estate. Two quick-detach sling sockets with anti-rotation design keep your carry system secure and snag-free, whether you're slung up in a vehicle, moving through brush, or setting up at a stand.

Installation comes straightforward: the package includes a heat-treated barrel nut and wrench, so you're not hunting for compatible parts. Note that this handguard is engineered for direct impingement AR-15s and may not play nicely with all billet upper receiver designs or gas-piston conversions—confirm compatibility with your platform before ordering.

Key Features

• Free-float design for improved accuracy and consistency
• Seven rows of M-LOK slots for customizable accessory mounting
• Continuous Picatinny rail on top for optics and fixed sights
• Two quick-detach sling sockets with anti-rotation design
• Aluminum construction, fully machined in the USA
• Includes heat-treated barrel nut and installation wrench
• 13.375-inch length fits mid-length AR builds

Specifications

Frequently Asked Questions

Will this handguard work with my gas-piston AR or billet upper?

This handguard is designed for direct impingement AR-15s. It may not fit all billet upper receiver designs and is not intended for use with gas-piston AR rifles. Verify compatibility with your specific platform before purchase.

What accessories can I mount on this rail?

The seven M-LOK rows give you plenty of attachment points for lights, vertical grips, bipods, cable management, and other M-LOK-compatible gear. The continuous Picatinny rail on top is dedicated to optics and backup sights, keeping those solutions separate from your tactical add-ons.

Is installation difficult?

A heat-treated barrel nut and installation wrench are included, giving you the core hardware you need. Standard AR gunsmithing knowledge is required; if you're not comfortable installing a handguard yourself, a qualified gunsmith can handle it quickly.

Does this affect my rifle's zero?

The free-float design actually improves consistency shot-to-shot by isolating the barrel from the handguard and upper receiver, which can improve your accuracy. Installing a new handguard typically doesn't shift zero, but always confirm your zero after any action-level work.