Intro: Pieces You Need
Here is what you need
2 or 3 lego 1x1 lego studs/dots
a nerf dart with no tip
a nerf gun
Step 1: Putting It Together
Take the studs and put them together. Put them in the nerf dart so just a bit is showing.
There, you have it, but now the downside is that sometimes the dart is really inaccurate.