Instructables
A weekend project of mine for the sole purpose of being classy. The one problem I had was the air seal wasn't perfect, so it wasn't very efficient, but a definite catalyst for shenanigans. 
Raduken2 years ago
can u make the instructables
pie R []ed (author)  Raduken2 years ago
I may in the future, but this project is long past for me and the original is actually now broken. It has some cool features, but it wasn't really worth all the trouble as a practical Nerf weapon. I would suggest you look around Nerf modification forums as there are many custom builds that accomplish the same thing I did here but with better features.