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. Features: Bright red 5 mW aiming point is closer to the bore than any other Manufactured with premium raw materials to ensure superior reliability Programmable for steady or pulsing beam that makes target easier to spot Distinct ambidextrous on/off switch reinforces safe handling Rugged internal design does not restrict holster or grip selection Factory-aligned to stock ballistics for guaranteed POA/POI accuracy Torture tested Recoil proof