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Homemade Mini Coaxial Airgun

Step 7Have fun with it

Once you are done waiting for the glue and epoxy to dry all you need to do is unthread the 3/4in to 1/2in adaptor out of the female adaptor and pop in your piston. Rethread the 3/4in to 1/2in bushing and your set.
Charge it up to whatever pressure you like(under 140psi)
And unleash by opening the ball valve.
http://www.youtube.com/watch?v=19ROhC86BmA

Remember all the safety rules stated at the beginning.
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Author:bigbob12345