Ade Advanced Optics Pistol Low Profile Compact Red Laser Sight with Built in Picatinny Weaver Mounts Compact, Low Profile, Matte Black. Weight:1.4oz Compact Red Laser Sight for XD, GLK, S&W, FN, or SIG Windage & Elevation Adjustment ( Allen Key Included ) Horizontal ON / OFF Switch Battery Included. Class IIIR laser product, &lt;5mW power output.