Just a little portable slingshot I designed while I was bored. Great foldable design and surprisingly good performance for its size. It can even fit inside a wallet!
Print all pieces with at least 20% infill so that they are strong.
To join the pieces together you will need a 3mm rod. I personally used a wooden rod like the ones used to make skewers. You might need to make the holes in the pieces bigger using a drill bit or a screwdriver depending on your rod.
Pass the rod through the middle piece and adjust the rods length by cutting it so that the side pieces fit right nbext to the middle piece.
Once the rod is the correct size, pass it through the middle piece and superglue the side pieces to the rod so they dont fall out anymore. Do not superglue the middle piece to the rod or otherwise the side pieces will not be able to rotate.
After that grab some rubber bands and cut a piece of some grippy fabric and attach them to the side pieces where the dents are.