This is a remix of the "Mini Cross Bow" by sthone. It fully captures the Q-tip projectile so that it is less likely to become free except by firing! It uses the same hair clips as spring arms. A small bit of wire can be used as a pivot. I used fishing line as the string. It is quite strong and will fire a projectile 25 feet (depending on weight).
Always use responsibly and wear eye protection if you can't do that.