XS SIGHT SYSTEMS OPTIC MOUNT/PLATE RMR/507 BUNDLE FOR GLOCK 17,19,22-24,26,27,31-36,38 Their ready-made Optic Plate and Sight combo offers a one stop shop mounting solution, while increasing window visibility and providing a simple back up sight picture. XS OR Sights for Glock pistols are low-profile BUIS that do not obstruct your field of view. XS OR sights eliminate the need for height calculations, giving you the perfect co-witness out of the box. Designed for strength and reliability, the XS Optic Plates for Glock MOS pistols are available for both RMR and ACRO footprint optics, providing a secure and seamless mounting solution. FEATURES Ready-mad Mfg: Xs Sight Systems