The Mepro MPO-DS is an open reflex red dot sight tailored for subcompact or slimline pistols. This cost-effective optic delivers exceptional performance, featuring a 3.5 MOA red dot reticle, RMSc/JPointA(R) footprint, automatic brightness control, and a CR2032 battery with a lifespan of over three years. It is water, shock, and fog proof.Upgrading your current sighting system with the Mepro MPO-DS leaves you with money to spare for more ammo. At MeprolightA(R), we produce products that we trust and use to protect ourselves and our families. Choose the best-choose MeprolightA(R).