Has anyone had any first-hand experience with one of these? There doesn't seem to be a lot of information or reviews out there on them as of yet it. My impression is that this is SIG's version of an ACOG, but I am intrigued by the reticle being dual purpose for both 5.56 and 7.62 (or at least this is what I have been led to believe) - is this accurate? Cheers CGN'ers!!!