ok thanks, I was curious what BAR was,also, I would say when making a cannon never make things permanent until you get to a state in which you know no more work will e needed to be done to it aside from routine maintenance

what is the tank you used for the school cannon?

well seeing as I have very little knowledge in spud cannon terms I don't really know what pressures we are talking about give me an idea in terms of PSI

non-hardening thread sealing goo?

you can take the gps chip out of a phone and power it with a AAA battery, with a small antenna of course

he could feed it some of that stuff Alice drank to shrink it but, to post in a non-wibbletacular fashion if you do find it post a before and after pic of it, I would like to see how much damage it takes

put a cheap cellphone in it before you fire so you can use the gps to find it,jk

that is excellent news I shall have mine fahjah (goldmember reference) drive me to advance auto parts

Check out the BBMG http://www.spudfiles.com/forums/templates/DAJ_Glass/images/wiki.gif page and this thread for some useful advice on what will make your BBMG more powerful and efficient.
And no one has yet pointed out that this in in the pneumatic cannon showcase, not the BBMG discussion board ...

how much do they cost though?

no shop around me sells brass that small in usable quantities, I only get small 1-3" nipples

well, how much are those brake lines?

would the brass coupler in the middle be able to cause it?

I found the seams to be an issue when I bought them, one of the tubes had a seam that extended too far into the inner diameter and caused the bb's to stop, I had to jam a screwdriver in it to let them pass freely

yes, they are galvanized pipe nipples (very drawn out post because it won't let me have short posts)