LL-810 Laserguard Pro compatible with GLOCK Subcompact pistols is a powerful red laser sight and 150 Lumen LED white light in a single compact unit. This illumination and targeting product is activated with Crimson Trace’s famed Instinctive Activation, which activates the unit via a front activation button when the pistol is held in a normal firing grip. The LL-810 features four modes of operation (see below), a Master On/Off Switch, is completely user-installed in moments with no modifications to the gun frame and the laser is user-adjustable for windage and elevation. Offers 2 hours of battery with a single CR2 Lithium battery. Laserguard Pro fits: Glock Gen 3 26/27/33/36 Gen 4 26/27/33 Gen 5 26. Will not fit Glocks with accessory rails.