Both barrel parts aren't mine and credits go to whoever made them.
Oh and I have no idea what the fps is sorry.
Constructive criticism welcome.
First instructable please be nice.
Step 1: Materials
a dismantled BIC pen tube
a nerf dart minus the velcro, plunger, whistle, etc.
a nerf switch shot EX3 (will probably work with any front-loaded gun)
and a pair of needle nose pliers