Crimson Trace Corporation, Laserguard PRO, Laser and Light, Fits Glock 26/27/33, Black Finish, 150 Lumen LED, Red Laser, User Installed, Instinctive Activation, 4 Modes WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Front activation Red laser Factory sighted at 50Ft .5 inch diameter at 50 feet LL-810 Laserguard(R) Pro(TM) for 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(TM), 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. This model will fit the following GLOCK pistols: 3rd Generation 26, 27, 33, 36, Gen4 26, 27, 33, and Gen5 26.