Either upgrade your existing MI AK handguard with an optic specific top cover, or purchase as a complete optic specific set. Installs in just minutes using on only the wrenches provided, no gunsmithing required. The top cover allows the use of red dot and iron sights, with the iron sights appearing in the lower third of optic. They are lightweight and are constructed of hardcoat anodized 6061 aluminum. Optic specific for many of the most popular optics on the market. Made in the U.S.A. and are backed by a lifetime warranty. Midwestindustriesinc.com.