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Pneumatic Golfball Cannon- Shoots 450+ yards!

Step 10Finishing up

Finishing up
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Once everything seems to be fine, cut a piece of 50mm PVC about 7cm long and solvent weld it to the tee from the stock and then solvent weld the piston housing tee on top, make sure the tee's line up with each other and are pointing straight.

Now thread on the male 2" threaded adapter with coupler, and sleeve your 2" barrel through the barrel support and you're done. If you want to use the golfball barrel just thread on the other adapter with the 1/5" coupler and sleeve the golfball barrel through the 2" pipe to keep it stable. So you don't have to take the 2" barrel off.

The breech loading is simple, push the barrel in the coupler to lock it, pull it out to load it. Make sure you jam it in tight when you're about to fire something.


Lube up your piston with plumbers lubricant and slide it inside the piston housing, put in your bumper and then thread your 2" x 1" adapter on the back. The point of this is so that if the piston craps out, you can access the piston housing and remove it and put a new one in. But the piston should be fine.

Once that's down, thread your pilot setup on, you may have to do it in pieces so everything fits and doesn't hit the stock. Make sure to use teflon tape as well.

Making the pilot setup is something that you can customize to suit your liking, but you can follow my pictures if you want to do it my way.
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Author:MrCrowley(Spudgun forum I help moderate)
I love building things that shoot other things whether they be small plastic BBs or 135g steel ball bearings. If you need help with a spudgun feel free to ask on Instructables or on Spudfiles. My use...
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