Primary Arms SLx Cantilever Mount, 34MM Scope Ring, 1.5 Optic Height, Anodized Finish, Black SLX-CM-34-1.5 Primary Arms SLx Scope Mounts are made from 6061 Aluminum and feature steel hardware with an innovative three-bolt design that distributes recoil evenly with over 6,500 lbs of clamping force. Combined with dual machined recoil lugs and 3 cross bolt lugs, SLx mounts can resist heavy impacts and sustained gunfire without ever shifting your zero-all while remaining lightweight and compact.