NcStar Red Laser Sight with Weaver Mount (APRLS), Black Weaver style mount will fit most weaver & Picatinny type rails; Includes mounting tools Fully Adjustable for Windage and Elevation Side to Side Toggle On/Off End Cap Switch Uses 3 each AG13 button cell batteries (Included) Class IIIA Laser Product, &lt;5mW power output Red laser sight designed for paintball makers with Weaver rails Lightweight aircraft-grade aluminum construction Equipped with 635 to 655 nm red laser beam Specially designed Weaver-style mount; standard on/off cap switch Runs on 3 AG13 lithium batteries (included); weighs 3 ounces