The Mirage Reflex Tactical Sight is the perfect item for your military style guns. It has a strong aluminum body with a black anodized finish and 30mm diameter tube. The 35mm objective lenses have a protective coating and the dot size is 3 M.O.A. The sight is powered by a 2032 lithium battery and a goose-neck mount and flip-up covers are included. The water-resistant sight is 5” in overall length.