The Dual Lever series of precision optics mounts features the Patented [US Patent 8,567,105] BLAC™ lever system and are engineered for larger diameter scopes. The base has an extension that allows proper eye relief, even when using a non-monolithic rail. It is designed so that the base allows the use of a folding back up iron sight (BUIS). The structure is designed for maximum strength, and utilizes larger fasteners than our standard lineup. This mount is engineered to handle heavy optics and high recoil forces.