XS Minimalist OR Sights for Glock pistols are simple and low-profile back up iron sights to maximize visibility through your optics window. XS OR sights eliminate the need for height calculations, giving you the perfect co-witness out of the box. The rear sight features blacked-out serrations to minimize glare. The front sight is available in two variations, users can choose between a standard blacked-out front or a front sight with a tritium dot for enhanced low-light performance. These purpose built back up iron sights are designed to enhance visibility through the optic window and be there should the optic fail. Product Features: BlackNitride surface treatment - enhanced corrosion resistance Low co-witness - low enough to avoid distractions in optic window Tritium or non-tritium front sight - optional low light visiblility Blacked out serrated rear - reduces glare and distractions CNC machined steel - durable and American made Glock MOS compatible, offers low-cowitness with RMR and ACRO footprint optics Kit includes: front sight, rear sight, and red threadlocker Sights will fit the following Glock Models: 17, 19 ,22, 23, 24, 26, 28, 27, 31, 32, 33, 34, 35, 36, 38, 39, 45, 47, & 49