The LG-489 Laserguard is a seamlessly integrated laser sight for Smith & Wesson's new M&P Shield concealed carry pistol. This Laserguard is designed to match the unique design of the pistol and features Crimson Trace's patented Instinctive Activation which allows the laser to be activated when the gun is held in a natural firing grip. Easy to install with no gunsmithing required. The LG-489 Laserguard is also fully adjustable for windage and elevation. Operates for up to four hours on one CR2 Lithium battery. Three-year manufacturer's warranty.