I have had my new Mossberg 590 Tactical, 9-shot Tr-rail, with Accu-Choke, or simply model #50670, for a little over a week now. I did make a few mods, Magpul Stock with Airtech Limb Saver, and a Mesa Tactical Sidecar. Took it to the Range this last weekend, with one of my sons, and sighted it...