Midwest Industries G4M M-LOK Handguard - Black

The Midwest Industries G4M M-LOK handguard is a purpose-built aluminum forend for AR-15 platforms that want real modularity without compromise. Built from 6061 aluminum with a hardcoat anodize finish, the G4M combines lightweight construction with seven sides of M-LOK slots so you can mount lights, grips, rail sections, or whatever accessories match your mission. The top surface runs a continuous Picatinny rail for optic-height accessories like backup sights or night vision mounts, giving you the best of both attachment systems in one handguard.

Midwest Industries engineered this for durability and user comfort. The barrel nut and torque plate are heat-treated 4140 steel for strength under recoil, and every edge is fully dehorned and deburred so your hands stay comfortable during long range sessions or field work. Five integral QD sling pockets are positioned around the handguard, letting you attach a sling from whatever angle works best for your setup. Available in five lengths—10.5”, 12.625”, 13.375”, 14”, and 15”—the G4M fits short-barreled rifles, mid-length builds, and longer precision setups.

Made entirely in the USA and backed by Midwest Industries' lifetime warranty, the G4M is a no-compromise choice for hunters, competition shooters, or anyone who needs a modular platform that won't let them down.

Key Features

• Six-sided M-LOK access for lights, grips, rail panels, and custom attachments
• Continuous Picatinny rail on top for backup sights and optic-height gear
• Five QD sling pockets for versatile carry options
• Fully dehorned and deburred edges for comfortable handling
• Heat-treated 4140 steel barrel nut and torque plate
• Available in five lengths to fit short-barreled and mid-length AR builds
• 100% made in the USA with lifetime warranty

Specifications

Frequently Asked Questions

Which AR-15 barrel lengths does the G4M fit?

The G4M comes in five lengths to accommodate different builds. Choose 10.5” for short-barreled rifles (SBRs), 12.625” or 13.375” for mid-length carbines, 14” for standard-length builds, or 15” for longer precision setups. Verify your barrel length and desired handguard coverage before ordering.

Can I use both M-LOK and Picatinny accessories on the G4M?

Yes. The G4M features seven sides of M-LOK slots for direct-attach M-LOK gear, and a continuous Picatinny rail across the top for standard Picatinny-mount accessories like backup sights or night vision mounts. Both systems work together on the same handguard.

Is the G4M made in the USA?

Yes. The G4M is 100% manufactured in the USA and comes with Midwest Industries' lifetime warranty.

What's included with the handguard?

The product includes the handguard, barrel nut, and torque plate. Verify fitment to your AR-15 platform and ensure proper installation per manufacturer guidance.