Laserguard Pro for Glock 42, 43, 43X and 48 is a powerful laser sight and 150 Lumen LED white light in a single compact unit. Designed specifically for these compact platforms, this illumination and targeting product is activated with Crimson Trace&';s famed Instinctive Activation, which activates the unit with a normal firing grip. LL-801 offers four modes of operation: Laser + Light, Laser Only, Light Only, and Laser + Light Strobe. The unit features a Master On/Off Switch, is completely user-installed in moments, and is adjustable for windage and elevation. *Compatible w/Glock 42, 43, 43x and 48. **Will not fit variants equipped with accessory rails.