Waterproof Shockproof Fogproof(Nitrogen gas inlet) Complete with Extension tube & Mounts Polarizing filter included Single Dot We have a forty-year experience in production of high precision optical sights; red-dot sight and riflescopes. All products that we manufacture consist of Japanese parts, even a small screw. We have been offering our high quality products to a global market, and receiving great appreciation from users. We have good capacity to fulfill client’s requirement to develop any types of red-dot sights and riflescopes.