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
Step 2: Barrel
Just pit the pen into the nerf dart, and leave a little bit of the pen sticking out the side you put into the gun.
Crimp the top a little with the pliers so the bullet doesn't fall out
Step 3: Insert barrel and your DONE!!!
I AM NOT RESPONSIBLE FOR ANYTHING STUPID YOU DO WITH THIS. ANY INJURIES CAUSED WHILE USING THIS GUN ARE NOT MY PROBLEM. My word of advice..... DONT SHOOT YOUR EYES OUT!!!!! WEAR EYE PROTECTION!!