The Midwest Industries Gen 4 M-Series M-LOK Handguard, 15 inches (Midwest Industries part no. MI-G4M15), extends free-float rigidity further down the barrel for rifle-length AR-15 builds. Machined from a single piece of aluminum, this one-piece free-float design eliminates the flex and point-of-impact shift that comes with two-piece drop-in handguards, keeping the barrel completely isolated from grip pressure and accessory mounting. A 5-slot M-LOK rail section ships in the box, giving builders an immediate spot to mount a light, sling, or grip without buying separate hardware.

Key Specifications

• Handguard length is 15 inches, sized for rifle-length and longer AR-15 builds.
• Built as a one-piece free-float design that fully isolates the barrel from outside pressure.
• Constructed from aluminum for a strong, lightweight rail system.
• Ships with a 5-slot M-LOK rail section included for immediate accessory mounting.
• Confirmed AR-15 accessory compatibility for direct fitment on AR-15 platform rifles.
• Model belongs to the Gen 4 M-Series, Midwest Industries’ current-generation M-LOK handguard line.
• Shipping weight comes in at approximately 1.4 pounds.

Frequently Asked Questions

Does this handguard include any rail sections? Yes, a 5-slot M-LOK rail section ships with the handguard so builders have an accessory mounting point right out of the box.

Is this a drop-in or free-float handguard? It’s a one-piece free-float design, meaning it doesn’t contact the barrel and won’t shift zero under grip pressure or accessory loads.

Buy the Midwest Industries Gen 4 M-Series M-LOK Handguard 15in AR-15

Build a lighter, stiffer AR-15 with a free-float rail engineered for real-world reliability. Midwest Industries backs its Gen 4 M-Series with the fit and finish serious builders expect. Order it from our Lubbock, Texas gun shop and browse our full AR handguards selection for fast, direct shipping.