Not actually 1/3 co-witness
While there is no doubt about the quality of this mount, it suffers from the same fatal flaw of all Geissele red dot mounts...it's not what it claims to be. Geissele claims there is no industry standards for absolute and 1/3 lower co-witness...that's because their mounts don't conform to industry standards. Geissele's 1/3 mount (1.515" from center to top of rail) is lower than the industry standard for absolute (1.52"). So while the mount itself is excellent, it's not at all what I thought I was purchasing. If it conformed to standards it would be a 5 star product.
