The XS Sights GLOM001SM1RMR Glock MOS Optic Plate is precision-engineered from black nitride steel to provide a secure mounting platform for RMR footprint optics on compatible Glock pistols.XS Sights Glock MOS Optic Mounting PlateCompatible with RMR and 507 series opticsFits Glock models 17 19 22-24 26 27 31-36 38Durable black nitride steel constructionPart number: GLOM001SM1RMREssential for Glock owners looking to mount red dot sights with RMR footprint compatibility providing a solid foundation for enhanced accuracy and target acquisition.