LaserMax Inc. adds the full-size .40 caliber Smith & Wesson M&P guide rod laser to its family of guide rod laser aiming systems. This is the first guide rod engineered by LaserMax since 2007 and incorporates the latest in construction materials and technologies. This laser design has always provided for an accurate and durable threat assessment in a laser aiming system. The M&P guide rod, like other LaserMax guide rod laser aiming systems, is user installed accurate with factory alignment and "no gunsmithing" required. Simply replacing the existing factory guide rod and takedown lever with our laser sighting system and our takedown lever which doubles as the on and off switch for reliable first shot confidence.