The FlipDot Patent Pending folding Red dot reflex lens (22mm X 16mm) folds down flat when not in use. With a push of a button the FlipDot lens flips up and automatically turns on. The 3 MOA Red dot is fully adjustable for windage and elevation. Folding the lens down turns the optic off. Includes an RMR base mount that mounts into the Glock® slide rear sight dovetail. Will fit most double stack magazine Glock® models. Replaces rear iron sights. Note: the use of the 2mm optic spacer for RMR® mounting applications may require longer optic mounting screws.