The Mepro MPO-DF is an open reflex red dot sight designed for full-sized pistols. This cost-effective optic offers outstanding performance, featuring a 3.5 MOA red dot reticle, RMR footprint, automatic and manual brightness controls, and a CR1632 battery with a lifespan of over two years. Its water, shock, and fog proof design sets it apart from the competition.Upgrading your current sighting system with the Mepro MPO-DF leaves you with money to spare for more ammo. At MeprolightA(R), we create products we trust and use to protect ourselves and our families. Choose the best-choose MeprolightA(R).