The Trijicon MRO HD features a large aperture maximizing the viewing area, allowing for better situational awareness and fast target engagement. It also features ambidextrous brightness controls, sub-flush adjusters, advanced lens coatings, and a fully sealed, waterproof, hard anodized forged 7075-T6 housing, making the MRO the ultimate mini reflex sight. Trijicon MRO HD & Magnifier Miniature Rifle Optic IMPROVED TARGET VISIBILITY Segmented Circle reticle optimized to function with magnfier Refined 2.0 MOA center aiming dot with 68 MOA reticle Compact magnifier saves rail space EASY-TO-USE Ambidextrous brightness setting controls User-sel Mfg: Trijicon