ASG Universal Laser, Integral Weaver Mount + Rail for AccessoriesASG universal laser Class II laser 1. 70mm beam 652nm 0. 823mW Elevation and windage adjustments Ambidextrous on off switch Integral Weaver mount Press buttons on sides to lock in the mount (also has a retention spring) Additional Weaver mount under laser for mounting a tactical flashlight Uses 3 LR44 batteries (not included) Lasers can be used on rifles or pistols with appropriate rails. Because the laser's dot is reflected on the surface of your