The Primary Arms Tall Flip to Side Magnifier Mount with Thumb Screw mount is perfect for placing a magnifier behind all 7mm raised base EOTechs and other high mounted red dots. Once your magnifier is installed in the 30mm ring, simply pulling the magnifier to the rear unlocks the mount, allowing you to instantly choose between centerline and off-centerline positions. This mount places the center of the magnifier 1.75 inches above the top of the 1913 Picatinny rail. This magnifier will ONLY line up with raised base optics! 30mm red dots, Micro dots, and other scopes in their standard mounts will not align with this unit. This tough mount features a lifetime warranty.