An air rifle maybe a good option. Perhaps a rimfire .22 would also fill that role well. I don't own one but despite being kind of quirky a ruger 10/22, along the standard 10 round rotary mag, you can also buy from ruger 15 and 25 round mags to feed it. the only down side to the 10/22 is that you can only shoot .22LR out of it. what I would use to that role would be may be either a tube fed lever or pump action (witch ever you prefer) .22 rifle. with the tube feed you can shoot either ,22 short,longs or long rifle shells.
I've been thinking about adding an air rifle to my survival kit. Thus far I've been looking at a Benjamin .22. I've seen several styles, so I'm still trying to decide which would be the best for my purpose; they also come in varying prices from $189 to over $500.
The .22, I believe, would be a good caliber since it has enough power to take down small game at 25 yards, it doesn't make much noise, and it is low maintenance. Also, it wouldn't require keeping a lot of heavy ammo on hand. And in a last ditch scenario, it would be better than nothing since it is capable of dropping a coyote. Something capable of doing that would definitely disrupt someone's day.
This is one that I'm looking at. The video shows animals being hunted, so it may be offensive to some. Keep in mind this is for survival with the acquisition of food being paramount: