here's a cool video of a small cannon

[horatioo]

http://www.youtube.com/watch?v=IxHW-QGMuZ4&feature=player_embedded

 

[SouthCali]

someone posted this before, soo cool though! WIsh i could build one of these, awesome!

 

[Lavid2002]

Probably easy with a lathe... I dont think mine would come out as pretty though...

 

[Mike Irwin]

Already under discussion here:

http://thefiringline.com/forums/showthread.php?t=409165

Closed as a duplicate.