Well, folks, I've tried a pretty broad range of "Survival" weapons, and in the end, the best gun to use is the one you can shoot straight, every time.

One thing that sure surprised me on the .22 thread was how few people seem to understand that you get one shot - and only one shot - to take small game, and if you miss, you're going to be sitting for quite a while waiting for another target. Which is why, while a .22 is a darn fine caliber and has some great options for "survival" guns (Ruger 10/22, AR-7), the fact is that unless you're reliably hitting bottle caps - moving bottle caps at that - at 50 yards with your .22, you'll want to have a shotgun for more reliable small game hunting.

Now, the .410 cartridge is small and light (not compared to a .22, of course) and here in PA, a .410 slug is even legal for deer hunting.
So for me, the M6 stainless .410/.22 combi is ideal