Imperialist1 wrote:well i could but im going for an airgun type gun not a cannon and i need it to be cheap and small enough to hide from my parens(they banned all of my others so im going small.)
I won't preach about what you should or shouldn't be doing, I was lucky to have parents too scared to tell me to stop with my experiments, it was fine as long as I confined things to my room. Of course they weren't too happy when a ball bearing ricochet went through my window (see attachments) but I paid for the glass and all was well
You can built the design I linked to with a shorter chamber and smaller (BB?) barrel if you want it to be concealable.