The Holosun SCS-MOS Reflex Sight is a direct attachment for full size Glock MOS systems, offering the lowest profile deck height for use with standard height iron sights. The SCS-MOS combines solar power, rechargeable internal power storage, low battery level indicator, and an auto adjusting brightness system to potentially operate indefinitely in multiple lighting conditions. FeaturesMultiple reticle systemDirect attachment to Glock MOS systemSelf adjusting parallax-free Unlimited eye reliefGrade 5 titanium housing DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.