The Trijicon Specialized Reflex Optic (SRO(TM)) 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 2.5 MOA SRO Green Dot features both manual and automatic LED brightness modes and a 2-year battery life on 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 RMRA(R), and ike 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. NOTE: If selecting an SRO for mounting on the GlockA(R) MOS, SpringfieldA(R) OSP, WaltherA(R) PDP, or H&KA(R) VP9 Optics Ready, a Trijicon SROA(R) mounting kit (AC32085) is required. Includes: 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