Crimson Trace Corporation, Laserguard, Fits S&W Shield, Black, User Installed WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Front activation Red laser Factory sighted at 50Ft .5 inch diameter at 50 feet The LG-489 is a seamlessly integrated laser sight for Smith & Wesson's M&P Shield 9mm & .40 S&W concealed carry pistol. This Laserguard(R) is designed to match the unique design of the pistol, and features our patented 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-489 is also fully adjustable for windage and elevation.