Midwest Industries is a proven leader in the firearm industry. Made in America focusing on the small details to make your rifle platform better. The addition of their HK M-LOK handguard will give you modularity you want to add lights and tape switches to this old school rifle platform. This model features 37 full and 7 half M-LOK slots and one five slot M-LOK compatible rail is included. There are also four anti-rotation QD swivel sockets. Fits HK 91 and clones. Features: Slim 1.6 inches diameter for a great feel Constructed of 6061 aluminum hard coat anodized 100% made in the USA Mil-Spec top rail