"Designed specifically for use in Sig Sauer P226 pistols chambered in 9mm, the LMS-2261G replaces Sig Sauer's factory spring guide assembly with a high intensity green laser sighting system for advanced target acquisition. Easily user installed without the need for gunsmithing or special tools, the Guide Rod Laser is constructed with rugged, precision components including aircraft-grade aluminum and genuine Wolff springs. Pulses for superior visibility and faster identification Internal design does not restrict grip or holster selection Distinct ambidextrous ON/OFF switch reinforces safe firearm handling Proximity to the bore provides maximum POA/POI accuracy Guaranteed alignment ensures center of mass shots Also available in red Guide Rod Lasers To ensure maximum product performance and reliability, the LaserMax Guide Rod Laser is manufactured using only the most premium raw materials. As Rugged As The Gun Frozen in ice, roasted in flames, crushed with heavy machinery, submerged to depths of 66-feet, shot to 20,000 rounds and dropped from five-story heights, the Guide Rod Laser meets and exceeds both NIJ and MIL-SPEC standards for issue firearms. No other laser sight in the world gets subjected to more rigorous testing. Pioneering Design The Guide Rod Laser's unrivaled internal design is carefully calibrated with each firearm's factory ballistics to ensure out-of-the box accuracy"