Midwest Industries MISLH105 Slimline AR-15 10.50" Black Hardcoat Anodized Aluminum/Polymer Picatinny/M-LOK Handguard

The Midwest Industries Slimline AR-15 10.50" handguard strikes the balance between lightweight ergonomics and serious accessory mounting real estate. This 10.5-inch model delivers the slim profile shooters want for quick-handling carbines and short-barrel builds—without sacrificing the rail space needed for lights, lasers, and sights. The 1.5-inch outer diameter keeps your grip hand close to bore center, while the 1.3-inch inner diameter maintains a clean, uncluttered aesthetic. Built from 6061 aluminum with Type 3 hard-coat anodize, it's tough enough for duty and competition use.

What sets the Slimline apart is the hybrid mounting system: a full-length Picatinny rail across the top for precision optics and accessories, paired with three sides of M-LOK slots for modularity and weight savings. The included 5-slot polymer M-LOK rail gives you a ready-to-go mount point out of the box. Two integral anti-rotation QD sling sockets are built into the handguard itself—no need for rail-mounted adapters. Installation is straightforward: the package includes a 4140 heat-treated barrel nut (also proprietary Midwest design) and a wrench, plus that patented 4140 torque plate for rock-solid indexing and repeatability. Everything arrives fully dehorned and deburred, ready to mount.

Midwest Industries manufactures this handguard stateside, and the engineering shows. Whether you're running a precision 300 BLK, a duty-ready 5.56, or a dedicated carbine, the Slimline 10.5" delivers a lightweight, modular platform that doesn't compromise on strength or feature density. The slim diameter makes it a natural choice for shooters who want handguard mounting without the bulk.

Key Features

• Full-length MIL-STD 1913 Picatinny rail on top for scopes and optic mounting
• Three sides of M-LOK slots for modular, tool-free accessory mounting
• Super slim 1.5" outer diameter and 1.3" inner diameter for reduced weight and closer grip-to-bore distance
• Two integral anti-rotation QD sling sockets built directly into the handguard
• Includes 5-slot polymer M-LOK rail segment, heat-treated barrel nut, torque plate, and installation wrench
• Patented 4140 heat-treated torque plate and barrel nut for reliable zero retention
• 6061 aluminum construction with Type 3 hard-coat anodize in black
• Fully dehorned and deburred for comfortable shooting and handling
• Made in the USA

Specifications

Frequently Asked Questions

What AR-15 barrels and platforms does this handguard fit?

This handguard is designed for standard AR-15 platforms. It ships with the barrel nut and all hardware needed for installation; compatibility depends on a standard AR-15 upper receiver. Consult your upper's specifications or contact us if you have questions about your specific build.

What accessories can I mount on this handguard?

The top Picatinny rail accepts any standard optic, magnifier, or rail-mounted accessory. The three sides of M-LOK slots work with the growing range of M-LOK-compatible lights, grips, bipods, and accessory rails. The 5-slot polymer M-LOK rail segment is included in the box.

Is the barrel nut included?

Yes. The package includes a 4140 heat-treated barrel nut with the patented torque plate, plus the installation wrench needed to mount the handguard to your upper receiver.

How much does this handguard weigh, and is it available in other lengths?

This is the 10.5-inch model. Midwest Industries manufactures the Slimline handguard in 9.25", 10.5", 12.625", 14", and 15" lengths to suit different barrel and build configurations. Contact us for weight specifications or availability of other lengths.