Crimson Trace Corporation Green Laserguard, Fits S&W Shield, User Installed, Black Finish 01-4490-1 The LG-489G is a seamlessly integrated green laser sight for Smith & Wesson's M&P Shield 9mm and .40 S&W concealed carry pistol. This Laserguard(R) is designed to match the unique design of the pistol" and features Instinctive Activation(TM) - meaning the laser is activated when the gun is held in a natural firing grip. Quickly installed with no gunsmithing required" the LG-489G is also fully adjustable for windage and elevation. Features a powerful green laser diode for improved laser targeting in all lighting conditions.