Viridian Weapon Technologies E-Series, Green Laser, Fits Taurus GX4, Black 912-0043 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.