Anyone installed one? I seen a couple of you tube videos installing the stock, and it looks like a good fit. I've read the one for the 1022 is kinda tight. I've got the 597 with a short, heavy barrel, I won't be installing the bayonet and I was wondering about the fit. What is the minimum length before I've accidentally built a restricted firearm? The collapsing stock can adjust possibly too short and make my overall length to short is what I'm wondering about.