The LG-443 fits GLOCK's slimline 42 (.380 ACP) and 43 (9mm) by securing firmly around the trigger guard. The Laserguard® features Instinctive Activation™, which allows the user to activate the laser sight by simply gripping the pistol in a normal firing grip. User-installed in moments, the LG-443 is also fully user-adjustable for windage and elevation.