The award-winning G-Series laser sights offer an even more compact frame application than traditional Lasergrips, maintaining your standard or competition-sized GLOCKs lightweight configuration. Engineered with Crimson Traces instinctive activation, the Lasergrip is engaged from the rear with your natural firing grip. Crimson Trace G-Series Lasergrips have been recognized with two Golden Bullseye Awards from the National Rifle Association and a High-Tech Product of the Year Award from the Firearms Industry Academy of Excellence. No other laser sight has won more awards.This Zombie Edition laser sight features our green Z grahpic and is only available for a limited time!Specifications:- Platform: Lasergrips - Material: Polymer - Attachment: Grip Replacement - Activation Location: Front Activation - Sighting: Factory Sighted at 50" - Batteries For Life: Yes - Battery Type: Two #2032 Batteries - Laser: Battery Life Over Four Hours - Laser Output: 5mW Red Laser - Activation Mode: Pressure Activated - Laser Visibility: Aproximately .5 Inch Diameter at 50 Feet - Wrench Size: 0.028 - 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" Fits: GLOCK Gen3 Full-Size Pistols [17, 17L, 22, 31, 34, 35, 37, 20SF, 21SF]