That's pretty much what I was thinking. Since it only works with the military optic footprint, it won't fit any other Sig pistol, at least not right now. Hopefully that will change in the future.Probably a pipe dream. But since all the M17/M18 I have have the mil. optic footprint. I hope I can get one of these.
The other kick in the pants is the list price is estimated to be in the $600 to $700 range. That's awfully expensive, even if it is a great optic.