my and my group members are deciding to go with propane, so anything i should know, list of materials?

yea man, how far does it fire?

my teacher could careless, i only said age so your not like go out and buy some $1000 peice of equipment

I need a list or materials or instructions or somehing

you have link to a walk throught or anything?

Hey everyone, Im build a WW1 Howitzer replica for a history project and recently decided to mount a Potatoe gun on it to make it a working model, and so i can a demonstation outside. Here what one looks like if your wondering http://www.irregularminiatures.co.uk/images/15mm_and_20mm_RUG6H.jpg Now I ...