I don't classify any particular gun as a "survival gun" simply because just as I do with all tools, I will grab whatever gun is required for the situation at hand. Most of my guns are part of contingency plans and most of those involve sheltering in rather than bugging out.

I grew up on the gulf coast and still have family scattered along the gulf coast and at times when there are hurricanes, etc and I am going to help them recover/evacuate I will grab a shotgun and a rifle to take with me along with my EDC handgun but those are mainly in case of looters or significant civil unrest that may develop in the area.

Guns are simply mechanical tools and whatever the situation I'm in, I would rather have the tool and not need it than need it and not have it.