The Midwest Industries SP Series Handguard (brand part no. MI-SP18M) is an 18-inch M-LOK free-float handguard built for AR-15 owners running a suppressor or a longer barrel configuration. Machined from 6061 aluminum and finished hard coat anodized, it’s built with a 1.75-inch inside diameter and 2.0-inch outside diameter to clear larger suppressors without sacrificing rail strength. A high-quality MIL-STD 1913 top rail runs the full length for optics and accessories, and Midwest Industries includes a 5-slot Magpul M-LOK polymer rail section along with the barrel nut and wrench needed for install. At 16 ounces and made in the U.S.A., it’s a lightweight, suppressor-ready upgrade.

Key Specifications

• Measures 18 inches long with an inside diameter of 1.75 inches for suppressor clearance.
• Built as an M-LOK free-float handguard for AR-15 rifles.
• Machined from 6061 aluminum with a hard coat anodized finish.
• Includes a MIL-STD 1913 top rail running the full length.
• Comes with a 5-slot Magpul M-LOK polymer rail section.
• Ships with the barrel nut and wrench needed for installation.
• Weighs 16 oz and is made in the U.S.A.

Frequently Asked Questions

Is this handguard suppressor compatible? Yes, it’s built with clearance for larger suppressors.

What rail interface does it use? M-LOK, with an included 5-slot Magpul M-LOK polymer rail section and a full-length MIL-STD 1913 top rail.

What is it made of? 6061 aluminum with a hard coat anodized finish, made in the U.S.A.

Buy the Midwest Industries SP Series Handguard

Get a suppressor-ready, free-float handguard for your AR-15 build from Midwest Industries. Browse more in our AR handguards lineup. Order from our Lubbock, Texas gun shop for fast, direct shipping.