While looking around the sporting goods at "Wally World", I saw a display of sling shots/wrist rockets and thought about all the rabbits, birds and squirrels I shot with one when I was a kid. At about 5-6 bucks I went ahead and got one and after a few shots practice, it started to come back and I'm still pretty good. You can use steel sling shot ammo or maybe lead musket balls (if you're not too P.C.) but marbles are real cheap at a hobby store and hit pretty hard at almost 200 mph.
Plus marbles aren't as heavy as the other types.
This is now with my camping/survival gear.
Just FYI...