Leupold® mounts are every bit as rugged and dependable as the Leupold optics theyre intended to secure. With a huge variety of mounting systems, for nearly every type of firearm under the sun, youre sure to find the perfect match for you firearm, and your style of shooting. Mark 4 CQ/T A.R.M.S. Throw Lever Mount Leupold Mark 4 CQ/T Flat Top Mounting Bracket Leupold Mark 4 AR-15/M16 Handle Mount Slot and Spline Design (Mark 4)