Higoo&reg; Powerful Green Laser Dot Sight, Military Tactical Hungting Green Laser Scope, Green Laser Pointer Presenter Pen Aiming Sight Barrel Mount fits for 11mm or 20mm rail. Green laser sight(less than 5mw), range from 30-100m day time, up to 2000m at night. Made of high quality aluminum alloy, light weight and durable, Inlcude 1xCR2 battery, 1x tail switch, 1x button switch, 1x wrench and storage box Quality guarantee, all lasers are tested before sending to FBA center, free replacement for any quality problem item.