LaserMax LMS1151G Green Guide Rod Laser for Glock 20/20SF/21/21SF Gen 1-3 Black

Designed specifically for use in Glock 20/20SF/21/21SF Gen-1-3 pistols. The LMS-G4-1151G replaces Glock'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.