Midwest Industries Slim Line Handguard, 10.5 Length, M-LOK. Aluminum, Fits AR-15 Rifles, Includes 5-Slot Polymer Rail, Black Anodized Finish MI-SLH10.5 The Midwest Industries Slim Line M-LOK handguard is a one-piece design that is machined from 6061 aluminum with a hard coat anodized finish. It features a full length Picatinny top rail and M-LOK mounting slots on 7 flats along its length. The handguard is fully dehorned for user comfort" and is a slim and sleek design with an outside diameter of 1.5" and inside diameter of 1.3". It comes equipped with two anti-rotation QD sling swivel sockets" one 5-slot accessory rail and comes with all required mounting hardware. Midwest Industries is a proven leader in the firearm industry. Made in the USA" focusing on the small details to make your rifle platform better.