Hi HD, coincedentally, I just shot one of those 22 pumps in early October at a friend's farm. It was fun, accurate and lightweight.
I'm not advocating people should carry a 22 rifle or anything else in their backpack when simply out fun hiking or overnighting, in fact, if they are in a National Park, State Park or State Forest it may be verboten.
I had just seen that kind of survival discussion so many times,
I thought I'd show it around. It solves the weight and compactibility problems to a great extent.
It strikes me as a survival small-game-getter type of tool.