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.