OSight Osight C, Handgun Sight, RMR Footprint, Matte Finish, Black, 3 MOA Red Dot and 32 MOA Circle, Side Loading CR1632 Battery OSIGHTCRD Engineered with advanced anti-reflective lens coatings, this sight maximizes light transmission for unmatched clarity, allowing you to quickly lock onto targets with pinpoint precision. The 0.95" x 0.75" window provides a larger sight picture, enabling faster target acquisition and quicker follow-up shots. Effortless battery replacement without removing the optic ensures hassle-free re-zeroing. A high-end CR1632 battery offers easy access while maintaining steady performance.