Can People Look Over My Idea :)

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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john bunsenburner
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Put a metal ball bearing in the mold and then fill it with candle wax(melt that any way you want from a pan on a stove to a candle and a lighter...).

Also lead is pretty easy to melt, but i understand your concern.
"Did you ever stop to think that out of the seven deadly sins envy is the only one which doesn't give the sinner even momentary pleasure"-George Will
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cangying
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Me too.
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chinnerz
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hmm nice, i like it. looks like that bolt system is working for you :P
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