The Osprey Global 3-9x42 Compact MDG Riflescope is a fog, shock, and waterproof scope with an illuminated mil-dot reticle and offering an eye relief of 4.9-8.85". It's Picatinny compatible with a length of 8.9" and a 30mm tube diameter. It's powered by a single CR2032 battery. Mounting rings, see through flip-up dust covers, and mounting tools are included with the scope.