I go to ACS International. Ranked 30th best IB school in the UK!...unfortunatley im too stupid to do full IB.

thanks for the feed back guys but remember in 15. Don't get too excited about the various machining methods for pistons. I dont have all the elaborate tools which output extreme precision. I think I'll try a wooden dowel, or a hot glue gun piston. The problem is that I dont have a hot glue gun nor n...

Thanks for responding,but what about a sealing face for the piston? I've tried the dowel idea and all it does is make a farting sound, and I've tried an end cap but nothing seals!

Hello, its my first time here, im 15 and I've had some experience with simple spring actuated ball valve cannons. I have carefully examined innumerable diagrams and pictures of the many assortments of valves and guns (BTB . cough*, Ragnarok. cough*). Anyway. I live in the Uk, London but thats as muc...