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 a Glock® MOS compatible mounting plate, *spare MOS mounting screws, 2mm optic spacer for RMR® mounting applications, spare CR2032 battery, optics cover, and mounting & adjustment tools. *Glock® MOS compatible mounting screws are included. Optic mounting screws for other types of slides are not included, please source the mounting screws from the slide manufacturer for an RMR® type optic for non Glock® MOS slides. Note: the use of the 2mm optic spacer for RMR® mounting applications may require longer optic mounting screws. Please follow mounting instructions in the FlipDot manual. 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. Weight is 1.0 oz. without the Glock® MOS mounting plate. Constructed of hard anodized aluminum. Ruby coated glass lens.