The Viridian E-Series Red Laser Sight is specifically engineered for everyday conceal and carry owners offering the most powerful red laser legally available with rapid target acquisition capabilities.Viridian E-Series Red Laser Sight for Ruger Security-9Trigger guard mounted design for easy installationAmbidextrous on/off button with 5-minute auto shut-off25-yard range in daylight and 1-mile range at nightConstant laser operation with 6+ hours battery lifeEasy windage and elevation adjustmentFits Ruger Security-9 Full-Size and Compact modelsNote: Serial numbers less than E138512 are fitted for Full-Size onlyDesigned for tactical applications and personal defense this laser sight provides reliable performance for concealed carry situations where rapid target acquisition is critical.