Trijicon MRO-C-2200006 1x25mm Miniature Rifle Optic (MRO) Riflescope with 2.0 MOA Adjustable Red Dot Reticle with Lower 1/3 Co-Witness Mount LARGE VIEWING AREA: Allows faster target acquisition and engagement with reduced tube effect. Waterproof-100 feet (30 m) ADJUSTABLE BRIGHTNESS SETTINGS: Eight brightness settings with a mid-position Off feature EASY-TO-SET ADJUSTERS: Adjusters provide positive-click reticle movement in MOA increments and require no special tools for operation SUPERIOR QUALITY GLASS LENSES: Multi-coated lenses provide superior clarity and light gathering capabilities with zero distortion and provide for a crisp dot reticle AIRCRAFT-GRADE ALUMINUM HOUSING: Forged 7075 housing and fully-sealed construction protects against the toughest elements; This model also includes the Lower 1/3 Co-Witness Mount.