LaserMax Model LMS-G43, Laser, Fits Glock 43, Guide Rod Laser LMS-G43 Designed specifically for use in Glock 43/43X/48 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.