GG&G EOTech Hood And Lens Cover Combo provide you with a cheap way to protect the expensive optics of your EOTech Red Dot! Designed for the 500 line of scopes, these lens covers are made to fit many configurations of EOTech Holo Sights, as well as providing easy installation and a low price point they are available with the enhanced 6061 T6 aluminum hood in a combo package. The GG&G EOTech Flip Up Lens Cover is easy to install - you only have to remove the EOTech hood and install the new hood and lens cover module. The GG&G hood is Type III hard anodized matte black to mil-spec and matches the original EOTech finish. All of the windage and elevation calibration markings on the GG&G EOTech Hood are fully engraved and present an off-white appearance to make it easier for the end user to reference.The GG&G EOTech Hood and Lens Cover Combo Package provides the same great features as the stand-alone lens covers. The lens covers are spring operated, so that once pressure is applied to release them from the closed position, they spring open. The rear cover lies across the top, so as not to interfere with the field of view. The front cover opens and serves as a sun shield. However, if heavy brush etc. is encountered, the front lens will fold back so that it is not damaged. Because of the contours of the EOTech body, these rifle scope lens covers are not 100% waterproof, but they do prevent most dust, debris, rain and snow from accumulating on the lenses. These unique lens covers for scopes can be easily operated with either hand to provide flexibility of operation. The new combo design and methodology is so unique that we were awarded a patent.The GG&G Hood And Lens Cover Combo will fit EOTech models 516, 517, SU-231/PEQ 553, 555, 556 and 557.