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.Power Switch: Ambidextrous On/OffWavelength: 520 nmDot Size: N/APower: