I was wondering if any of you have one of these in the 20 gauge model. I am thinking of getting one of these as the thought of hunting with a single shot is intriguing to me. I have read really good reviews on the 410 but not much on the 20 gauge. It comes with a rail for optics and the choke tube is designed for federal TSS from what I understand. Just wondering if anyone had one and your thoughts? Thanks!