Meprolight 901243171: Introducing the Mepro MPO-DS, an open reflex red dot sight crafted specifically for subcompact or slimline pistols. Despite its reasonable price, this optic offers superb performance. It comes loaded with features like a 3.5 MOA red dot reticle, RMSc/JPoint footprint, and an automatic brightness controller. The Mepro MPO-DS is not short on durability either - its CR2032 battery can last more than 3 years. It is waterproof, shockproof and fog-proof to ensure optimal performance under any circumstance. Enhance your current sighting system with this affordable upgrade and still spare some cash for more ammo. Meprolight represents uncompromised quality. Our products reflect our commitment to excellence as we use and carry them ourselves in the defense of our loved ones. Choose the best, choose Meprolight. IPX7 certified waterproof.