This Midwest Industries handguard adds serious tactical capability with visual appeal and utility. The 12.625" long handguard is compatible with most AR platform upper receivers and features 7 sides of M-Lok adapter slots with a full-length Picatinny rail in the 12 o'clock position giving you the ability to attach accessories in almost any position on the handguard. The MI-CRM15 is made of a lightweight and durable 6061 Aluminum that is built to take a beating without weighing you down at a light 9.9 oz. Features: 4140 Heat Treated Barrel Nut Barrel Nut and Wrench Included Features Patented 4140 Heat Treated Torque Plate Continuous MIL-STD 1913 Picatinny Top rail Two Integral Anti-Rotation QD Sling Sockets Super Slim 1.5" Outside and 1.3" Inside Diameter Seven Sides of M-Lok Fully Dehorned and Deburred 100% Made in USA- Keeps America Working MI Lifetime Warranty Shop Palmetto State Armory for the widest selection of Modern Sporting Rifle parts and accessories at the best prices around!