The Midwest Industries Gen 4 M-Series Handguard (brand part no. MI-G4M12.625) is a 12.6-inch, one-piece free-float handguard machined from 6061-T6 aluminum and finished in black hardcoat anodizing. It’s M-LOK compatible and built with a super-slim profile, just 1.5 inches on the outside diameter with a 10.3-inch inside diameter, so it doesn’t add unnecessary bulk to the upper. A 4140 heat-treated barrel nut and matching torque plate secure the handguard for a repeatable, correctly torqued install, and a continuous MIL-STD 1913 Picatinny top rail runs the full length for mounting optics or other rail accessories. Every G4M handguard is 100% made in the USA.

Key Specifications

• Built as a one-piece free-float handguard.
• M-LOK compatible for mounting lights, grips, and other accessories.
• Machined from 6061-T6 aluminum.
• Finished in black hardcoat anodizing.
• Super-slim profile measures 1.5 inches outside diameter.
• Inside diameter measures 10.3 inches.
• Secured with a 4140 heat-treated barrel nut and torque plate.
• Features a continuous MIL-STD 1913 Picatinny top rail.
• 100% made in the USA.
• Measures 12.6 inches in overall length.

Frequently Asked Questions

Is this handguard free-float? Yes, it’s a one-piece free-float design.

What accessory-mounting system does it use? M-LOK, plus a continuous MIL-STD 1913 Picatinny top rail.

Where is it manufactured? 100% made in the USA.

Buy the Midwest Industries G4M Handguard

A super-slim outside diameter and a full-length top rail make this handguard a versatile, low-bulk upgrade. Order the 12.6-inch G4M from Midwest Industries through our Lubbock, Texas gun shop for fast, direct shipping, and browse more AR handguards to finish your build.