Viridian’s E Series laser sight is specifically designed for the everyday conceal and carry owner. This model specific, trigger guard mounted, laser sight offers the most powerful red laser legally available, delivering rapid target acquisition when you need it most. Features easy installation onto the trigger guard of your pistol; ambidextrous on/off button with 5 minutes auto shut off; 25 yard range in daylight and one mile at night; easy windage and elevation adjustment. Fits the Ruger 5.7