A miniaturized version of the original RMS sight, the Shield Sights RMSC 8 MOA Red Dot is designed specifically for optics-ready sub-compact single-stack pistols. The lightweight aircraft aluminum housing offers reduced weight while remaining tough and durable enough to withstand harsh recoil and rough handling. The impact-resistant polymer lenses offer exceptional durability and a crystal clear sight picture. Scratch-resistant lens coatings protect against most field hazards, and the powerful LED dot emitter boasts multiple user-selectable brightness settings, allowing you to adapt to changing lighting conditions on the fly. Plus, the RMSC features an ultra-low-profile design for snag-free carry and natural co-witnessing with most standard-height pistol iron sights. Operates on one CR2032 battery (included) with up to 3 years of battery life.