The Holosun Solar Charging Sight (SCS-MOS) is a direct attachment optic for the Glock MOS systems offering their lowest profile pistol optic for use with standard-height iron sights. This unit fits on the pistol with no adapter plate needed. The SCS reimagines Holosuns Solar FailsafeTM system as a primary power source. The internal, rechargeable battery utilizes integrated solar cells and automatic brightness adjustment to make sure your battery will last as long as its shelf life. Given occasional bright light, the SCS will recharge itself. Additionally, the Multi-Reticle SystemTM (MRS) displays a 32MOA Circle or a 2MOA dot or both.