How To Make A High Power Air Cannon - 2 Piston Valve (Barrel Sealing)

In this video I build a high power air cannon using a PVC piston from my previous video (seen here): https://youtu.be/BCZGWvieJ7I

In case you're wondering how this cannon valve operates, I demonstrate the internal function at the 5:35 mark in this video.

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Music by Silk Music: www.youtube.com/SilkMusic
Track name: Sam Davies - Northern Lights (Original Mix)

Thanks for watching!