Lasermax guide rod lasers are designed for use in glock gen1-3 26 27 and 33 pistols the lms-1161 replaces glock's factory spring guide assembly with a high intensity red 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.Features pulses for superior visibility and faster identification internal design does not restrict grip or holster selection ambidextrous on/off switch reinforces safe firearm handling proximity to the bore provides maximum poa/poi accuracy and guaranteed alignment ensures center of mass.Power Switch: Ambidextrous On/OffWavelength: 635 nmDot Size: .75" @ 25 ydsPower: 3mWRange: 20 ydsWeight: 0.76 ozBattery: 319Laser Color: RedFirearm Fit: Glock 26 27 33 Gen1-3Adjustments: NoFinish: BlackMount Type: Guide Rod