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 new hood are fully engraved and present an off-white appearance to make it easier for the end user to reference. The front lens cover is engraved with either the GG&G Logo or the words "Front Towards Enemy."