LASERSIGHT ONLY FIREARM NOT INCLUDED. Viridian’s E-Series line is specifically designed for everyday concealed carry and is available for the top brands and handguns on the market. The E-Series Green Laser Sights will easily mount to the trigger guard and feature an ambidextrous on/off button with a 5-minute auto shut off just like their Red Sight counterparts. Easy installation onto the trigger guard of your pistol. Ambidextrous on/off button with 5 min auto shut off. Up to 100 yard range in daylight and 2 miles at night. Constant laser with +60 min battery life. Easy windage and elevation adjustment. Fits the Ruger® 5.7.