Hammers TMS 90 degree FTS Quick Flip to Side Mount for 30mm Magnifier Scope 42mm HIGH Easy to operate push buttom release Quick 90degree flip This is a HIGH mount that gives enough clearance under for installed BUIS backup rear sight Locks firmly in place at both ON and OFF positions Be sure to check the center height of your red dot sight. For EOTech sights of standard height, most likely you will need a lower mount of 36mm center height. Check our store for 36mm model.