Step 1: Supplies
1st: a carbon arrow or a pack of real cheap arrows (do not buy arrow heads)
2nd: some foam nerf darts or something similar
3rd: glue. most glues will work, but some may melt the foam. I'm using a modeling glue and duck tape (just as a precaution)
Step 2: The build
1st: take your arrow and apply some glue to the end where an arrow tip would usually go.
2nd: slide the foam and rubber dart onto the glue end
3rd: this is optional but recommended. Use either duck tape or electrical tape to secure the dart. I'm using blue and red (for two teams)