I recommend that you do some research into the Blowgun also. I have used them in the past very effectively. Most people think the darts have to be poisoned. That’s not always true. If you learn on a lightweight blowgun you can ramp up a larger size like half inch or even three/quarter inch. Learn to make your own darts and you will be very surprised and pleased at the results.
As far as slingshots go? I like the wrist rocket and I’ve also made an old fashioned sling, aka King Davids sling. They are a bit difficult to get used to so it’s practice, practice, practice.
Chronographs are pretty common nowadays, so this is a way shooters could have some cheap and silent fun, and maybe actually come up with a useful survival innovation.