The Crimson Trace Laserguard is a compact laser sight. The laser sight attaches firmly around the trigger guard and features Crimson Trace&';s famed Instinctive Activation, which allows the laser to be activated by simply gripping the pistol in a normal firing grip. It provides two hours of run time on a single 1/3N battery. Easily user-installed in moments with no alterations to the firearm, the Laserguard is fully adjustable for windage and elevation. *Fits Sig M17/M18/P320 models except subcompact frames.