What kind of hairspray works best? I tried some of my mom's but it just gunked up my igniter, so i'm stuck using axe.

that thing's awesome.

Where did you get that cardboard tube for the chamber? Im thinking of building one like this myself. Do you think an oatmeal box would work?

what did it cost to make that? it looks pretty awesome. I might have to build one like that for myself.

It would be really cool if you made it breech loading.

BTW- what fuel does it use to get 300 yds? mine only gets like 125 at the most

how big is that ball valve on the back?

I have one kind of like that. I shot a jawbreaker and dented the solid brass bell on my treehouse. I bet it has a lot of power.