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(R) MOS compatible mounting plate, *spare MOS mounting screws, 2mm optic spacer for RMR(R) mounting applications, spare CR2032 battery, optics cover, and mounting & adjustment tools. *Glock(R) 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(R) type optic for non Glock(R) MOS slides. Note: the use of the 2mm optic spacer for RMR(R) 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(R) slide rear sight dovetail. Will fit most double stack magazine Glock(R) models. Replaces rear iron sights.Weight is 1.0 oz. without the Glock(R) MOS mounting plate. Constructed of hard anodized aluminum. Ruby coated glass lens.DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.mbH. Neither "NcSTAR Inc. & VISM" nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.mbH. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK tools, mounts, or optics. For genuine GLOCK, Inc. and GLOCK Ges.mbH products and parts visit www.glock.com.US. Pat. 9869526US. Pat. D846689 etail