Crimson Trace Laserguard Green Laser Sight for Glock Full Size & Compact - LG-452  Laser-Guard for G-Lock 17, 19, 22, 23, 34 and 35, Black Hard Polymer, Rubber overmolded front activation Class IIIA laser; 5mW or less Green Laser with Instinctive activation and fully adjustable for windage and elevation Manufactured to fit seamlessly with the firearm frame No gunsmithing or frame modifications required for installation &lt;5mW power output