Designed with versatility in mind, the Rugged Universal Mount, or R.U.M., is made from Stainless Steel and is compatible with Rugged's Dual Taper Locking System and industry-standard mount; Coaxial Venting Technology directs gases away from the shooter while maintaining great sound quality. With the utilization of Cobalt 6 in Coaxial Venting Technology, it's durability is unmatched; Axial provides a repeatable minimal zero shift without degrading the accuracy of your rifle and can take a beating; Includes a Rugged Universal Mount, Flash Hider End Cap and 5/8x24 M2 Brake