Smith & Wesson now offers its M&P15T rifle with a factory-installed Crimson Trace LiNQ light-and-laser system.
LaserMax is now shipping GripSense-equipped CenterFire handgun lasers for Ruger and Smith & Wesson pistols.
A laser sight is a tool to help you aim a defensive firearm. For it to excel at that task it needs to shine on target at the point, or least very near the point, where the bullet will strike. To arrange this, you must zero the laser, and you must decide how you want the beam of the laser to correspond to the shot.