Begin by removing all the screws, and remove the plunger assembly from the gun. Make a cut on the tube similar to the diagram below:
Take the stump of the previous barrel that wasn't cut of, and rap some e-tape around it.
Now take some CPVC and epoxy it over the barrel stub.
Your going to want your coupler to go on so that there is a space between where the PT and coupler would touch. The following diagram better explains what I mean:
This gap is needed because there are fittings in the shell that went around the stock barrel there, and are needed so that the PT doesn't get dislodged in the shell after each shot. You could put it all the way back to eliminate dead space, cut those fittings on the shell, and epoxy the PT in, but then it won't be removable.
Now cut your CPVC so when the coupler is on that gap will exist. Then epoxy on the coupler.
Now you are going to need to shave that fitting on the shell I described earlier to fit the exposed CPVC. You will notice the front of the shell has been removed, this is explained later.
if it still won't fit in the shell (mine didn't) then shave the back of the coupler and the exposed CPVC like so:
Okay, onto the wimpy plunger head. It seems that the main reason the plunger head sucks so hard is because of how easy it is for it to bend and for air to get around. I fixed this by gluing a tiny sliver of FBR in there. I had to cut the FBR into 1/4's for it to fit. Also, replace the spring if you'd like.
The next bit is optional, but I did it so I could use a speedloader. Cut the front of the shell like so:
Now put everything in and close it up. The stock catch spring is incredibly strong, and is a bitch to keep from popping the catch out of place when closing the shell, just be patient. Once it's closed up, hot glue around the coupler to help reduce the amount of stress put onto the shell, this is very important if you replaced the spring or plan on banding it. Here's some pics:
Barrel on and primed:
Hope you guys enjoyed this write up. Question, comments, and flames are all welcome.
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Edited by TantumBull, 23 October 2008 - 11:29 PM.