Specifically designed for the unique contours of 4th Gen GLOCK Subompact pistols, the rear activation LG-852 offers a repeatable sighting advantage for your pistol. These Lasergrips provide the versatility of instant activation from a rear switch. Product Specifications Product Type: Lasergrips Material: Polymer Grip with Rubber Overmold Activation Pad Attachment: Grip Replacement Activation Location: Rear Activation Sighting: Factory Sighted at 50' Battery Type: Two #2025 Batteries Laser Battery Life: Over Four Hours Laser Output: 5mW Red Laser Activation Mode: Pressure Activated Master On/Off Switch: Yes Laser Visibility: Approx .5 Inch Diameter at 50 Feet User Adjustable: Windage and Elevation Finish: Polymer Grip Installation: User Installed Warranty: Three Year Full Warranty Color: Black Water Resistant: Yes Fits: Glock Gen4 (26/27/33) Subcompact Pistols