I am new to the survival arena (outside of my military training) and looking into it on a personal level. One of the things I looked for was a weapon I could take w/ me that was light, portable, and reliable. I have a sidearm, but wanted something I could use for hunting small animals (or the occasional larger one). I looked at the AR-7 and other collapsible rifles and went w/ the Kel-Tec Su-16. It provided me w/ different models to choose from, ammunition that is readily available, and simple in its design. It is collapsible to about 21 in. and can mostly fit in a pack if desired. Being the .223 round, it packs a bit more punch than a .22. It is very accurate at the distance one might need in an emergency/survival scenario.
There is already a review here by Doug Ritter and if anyone wants to get more information, there is a user group located
here . I encourage anyone interested to give it a look.