diaphram/piston coaxial

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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???

good
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you should make a larger launcher that has interchangeable valves too
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ok... and could need some improvement
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ok... and could need some improvement
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Alabaster
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What did you use for the center of the piston?
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I used a bolt and a nut to put the sealing face on. The pic was kinda blurry so it was hard to tell what it was.
Ecclesiastes 1:9 - What has been will be again, what has been done will be done again; there is nothing new under the sun.
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Alabaster
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Cool didn't cost allot did it?
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Location: Searcy, Arkansas (college) and Memphis, TN (hometown)

I found the nuts and bolts in my dad's workshop and I bought the 1/8" rubber at lowes for $2 in the plumbing section.
Ecclesiastes 1:9 - What has been will be again, what has been done will be done again; there is nothing new under the sun.
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