I just finished building a backup weapon/survival weapon. Slingshot bow. To my surprise, it shoots an arrow and steel shots very good. You can see in the photos the compound bow whisker biscuit installed. It flips up or down according to what you want to shoot.
I saw this on the FF and thought it was a good idea, so, I built one. Been practicing and getting pretty good with it.
I bought both off eaby, plus found some steel ball bearings (1000).
If you build one, be sure to get a sling shot with a frame like the one in the picture. Some frames will not hold the whisker biscuit correctly.
So, in a pinch, and no ammo, this is a handy weapon.