Intended for airsoft pistols & air pistols. Walther Shot Dot 10 MOA green dot 2 brightness settings 24mm objective lens Coated lens Parallax-free @ 10m Adjustable for windage & elevation Weaver mount Uses one hex screw to attach to gun's base 3"Lx1.22"Wx1.57"H 1.38 oz. Includes 3V CR2032 battery, hex wrench & instruction/mounting manual