Published on March 16, 2017
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**Airtube Extension**
( I haven’t seen just the tube anywhere, just within the packaging of ball pumps)
This could also work as a grenade launcher. All PVC can be modified to whatever size you want. I just wanted 1/2 inch because I thought it looked more realistic. “Nerf” darts can also be used with this method. “Nerf” gun modification with this example may be possible as well.
