The most technologically-advanced, hardened laser systems on the market, Guide Rod Lasers replace the recoil spring guide assembly in semi-auto pistols. Designed specifically for use in Glock 43 pistols, the LMS-G43 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 a stainless steel tube.