Ok, well. I kind of get it. Either way, I'm trying to make my own design but I'm having a little difficulty. What sizes of pvc did you use to encase the barrel? (In other words the piece of PVC you cut with the dremmel to attach the nob to pull the bolt)? Did you use CPVC at all?
Also, what did you use to make the shells out of? Do you think it would be possible to use croyola barrels?
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