The Trijicon MRO (Miniature Rifle Optic) is a sealed miniature reflex sight intended for use on rifles, carbines and shotguns. It features a large viewing area for quick target acquisition, ambidextrous brightness controls with 8 brightness setting and an off position in-between each subsequent setting and advanced lens coatings. It is waterproof down to 30 meters (100 ft.) and uses a single lithium battery that will run continuously on the 3rd daylight setting for 5 years. Housed in aircraft grade aluminum this MRO is the perfect option for fast and reliable target acquisition on your rifle or shotgun.