LaserMax LMSG41151G Guide Rod Laser Green Laser 5mW, 520nM Wavelength, Compatible W/Gen4 Glock 20/21/41

Designed specifically for use in Glock 20, 21, 41 Gen4 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.