Slim Compact Universal Laser Sight by Arma Laser - SR2 Stingray for Weaver Picatinny rails on Compact & Sub-Compact Pistols: Glock, H&K (not USP), Ruger, S&W (not Sigma), Taurus, Walther, 1911, Springfield, Beretta Compact Pistols with Rails Easy to use Ambidextrous touch activation for easy on/off access on either side of the laser sight Slimmest Laser Sight available for railed pistols - Only 1 3/8" L x 3/4" H FITS most railed COMPACT pistols : your pistol needs a distance of 1" between the notch in the rail & front of the trigger guard 5 YEAR INDUSTRY LEADING WARRANTY! Arma Lasers are Ultra-bright Class 3R 635nm &lt;5mW red lasers and are registered with the FDA as a laser manufacturer. Highest Laser Output Power by Law: 630-635 m, &lt;5mW CW with a 3 hr continuous on-time