The LG-417 presents the ultimate refinement in laser sight technology for GLOCK 17 and 19 based semi-automatics. This model features an improved fit for Level-3 professional holsters used by law enforcement professionals and military units worldwide. With this groundbreaking Crimson Trace Lasergrips design the LG-417 outfits GLOCK polymer pistols with a laser sighting system that is completely unobtrusive yet fully featured. - Platform Lasergrips® - Material Polymer - Attachment Grip Attachment - Activation Location Front Activation - Sighting Factory Sighted at 50' - Master On/Off Switch Yes - Battery Type Two #2032 Batteries - Laser Battery Life Over Four Hours - Wrench Size 0.05 - User Adjustable Windage and Elevation - Finish Polymer Grip with Rubber Overmold Activation Pad - Installation User Installed - Warranty Three Year Full Warranty - Color Black - Dot Size Approx. 0.50 at 50'