The Trijicon Specialized Reflex Optic (SRO) 2.5 MOA Adjustable LED green dot is the most popular reticle size and can be used in a wide variety of pistol and other shooting applications such as target shooting or plinking. The wide field of view and clean, crisp dot makes it easy for users to find and track the dot in both target and competitive shooting applications, helping improve shooting accuracy and speed. The SRO 2.5 MOA Green Dot features both manual and automatic LED brightness modes and a 2-year battery life at setting 4 of 8. The SRO is designed to survive the rigors of slide ride pistols and is engineered for hard use. It shares a similar electronics design with the proven Trijicon RMR . Like the RMR the SRO is forged from 7075, T-6 aircraft grade aluminum, this forged housing protects the lenses and electronics, and it has been tested to survive typical pistol mounted drops. Product Features LARGE, UNOBSTRUCTIVE FIELD OF VIEW: Parallax-free and compatible with suppressor-height iron sights. EASY, ADJUSTABLE WINDAGE & ELEVATION: Tool-less design makes zeroing hassle-free. SAME FOOTPRINT AS RMR : Mounts easily using the same base as the Trijicon RMR . CLEAR, CRISP DOT: Fine-tuned, illuminated reticle, coupled with exceptionally clear front lens, offers a clear sight picture with a crisp dot. TOP-LOADING BATTERY: Makes battery-switching fast and easy. COMPLETE USER-CONTROL ILLUMINATION SETTINGS: 8 brightness settings, including 1 super bright mode and 2 night vision modes. BUTTON LOCK-OUT MODE: Secures the Auto-Brightness setting feature ideal for everyday carry and hunting. BUTTON LOCK-IN MODE: Secures the user-chosen brightness setting indefinitely ideal for competition and target shooting. WATERPROOF UP TO 10 FEET (3 METERS): Made with durable 7075-aluminum housing. RED DOT PISTOL READY: Designed to fit on many of the most popular red-dot-ready brands on the market. Product Specifications Length x Width x Height: 2.2 in x 1.3 in x 1.4 in (55.88mm x 33.02mm x 35.56mm) Magnification: 1x Day Reticle Color: Green Bindon Aiming Concept (BAC): No Illumination Settings: Automatic and 8 Adjustable Settings (2 NV, 6 Visible) Battery Life: 2 years of continuous use (when used at 70 F (21 C)) at setting 4 of 8 Adjustment Range: 150 MOA Total Travel Housing Material: 7075-T6 forged aluminum Submersion Depth: 10 ft. (3m) Weight: 1.6 oz. (45.36g) Reticle Pattern: 2.5 MOA Dot Night Reticle Color: Green Illumination Source: LED Power Source: 1 CR2032 Lithium Battery Adjustment: 1 MOA Per Click Mount: Not Included Finish: Matte Black Included Trijicon Logo Sticker (PR15) 2ea #6-32 x1/2" Torx Head Screw 2ea #6-32 x .380" Torx Head Screw Torx Head Key Manual Warranty Card SRO Battery Cap Tool NOTE: If selecting an SRO for mounting on the Glock MOS, Springfield OSP, Walther PDP, or H&K VP9 Optics Ready, a Trijicon SRO mounting kit (AC32085) is required.