Made under the eHobby Asia brand, this quick detach S-Point red dot sight can be mounted on any 20mm weaver standard rail. It has auto brightness/adjustment, and UV Tempered Lens. Whilst it is is moist resistant and stronger, it can be easily hooked-up with installation in just seconds being a quick detach gun accessory. It is powered by a single CR1620 battery and is reasonably priced at US$27.99.