The Holosun SCS (Solar Charging Sight) is designed to attach directly to the slide without an adapter plate and uses an innovative solar charging system with multi-directional light sensors to automatically adjust brightness in dynamic situations. The SCS can potentially operate indefinitely using an internal, rechargeable 20,000-hour power reserve meaning under even moderate exposure to bright light, you will never need to change batteries again. The SCS also includes an intensity override function which locks the optic into a high brightness mode for 30 minutes and a low power indicator, which will signal if charging is needed upon system start up. Additionally, the Multi-Reticle System (MRS) displays a 32MOA Circle or a 2MOA dot or both. Grade 5 titanium housing. Fits Heckler & Koch VP9 Optics Cuts. Country of Manufacture: China. We do our best to prevent this from happening but it does occur on occasion. Doing that is against US and International Laws.