After using the C7 rifle for the last part of my Military career, I have zero interest in the AR15 type firearms. However, if I could, I would own an FN C1 in a heartbeat! Too bad it is on the prohib list. Not to say we shouldn't be able to own/use/carry the firearm of our choice, of course we should. Till then the SHTF firearm of choice for me is a short barrel 12g.
Back country firearm of choice is a levergun plus pepper spray.