The OSight C is a compact open-emitter reflex red dot sight for pistols, finished in matte black. It projects a 3 MOA green dot for fast, both-eyes-open target acquisition on optic-ready slides. Key specs: Dot color: Green Dot size: 3 MOA Reticle: 3 MOA dot + 32 MOA circle, multi-reticle (dot / circle / both) Emitter: Open Footprint: RMR (Trijicon RMR / 407c-507c) Finish: matte black Battery: Side-loading Mounting hardware included Supported footprints: Trijicon RMR footprint (407c / 507c pattern). Fits slides and adapter plates cut for the RMR footprint. Confirm your slide's optic cut matches the listed footprint before mounting.