The 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 ACRO footprint optics, providing a secure and seamless mounting solution.