Although I have no hands on knowledge of the SIG, it is the only new rifle I really want to add to my collection. If (big if) they grandfather in existing guns in any future AWB then I agree with you that it will be worth a lot to collectors. Since it's a SIG you can pretty much count on it being accurate. I doubt there would be any problems and I like the fact it takes AR mags. It should feel familiar to any AR shooter.