Bright laser marks point of impact on the target which has a constant or pulsing beam mode option. Laser is compact, and lightweight design for comfortable concealed carry. There is a single battery design for easy replacement without having to remove the laser from the rail and includes 1 CR1 3N battery give. Fits Picatinny, Weaver, Glock and many other manufacture pistol rails. Is adjustable for windage and elevation and has an adjustable recoil lug for versatile positioning. Features: Compact laser sight Fits Picatinny, Weaver, Glock etc.