•~4 inches of ½ inch cpvc
•A hacksaw
•A spring (I think I used a maverick spring)
•Duct tape or hot glue
Ok, time to crack open the gun. After removing the screws and opening it, these internals greet you.
Pull out the barrel, and pull it out of the tubing inside the grey tube. It should come out easily. Now remove the grey tube that is over the clear tubing.
If you’re using duct tape, wrap duct tape around the end of the tube until you can slide the cpvc on it and it fits snugly.
Put a few more layers over the cpvc and the tube. 
If you’re using hot glue, use a lot of it, and seal the tube in the cpvc. Make sure there are no leaks. Now time to use the hacksaw. Cut off the pieces that stick out in the section, one on top and the piece that holds on the red piece in front.
Now to replace the spring. Cut the tank where the picture shows, being careful not to cut the plunger.
Remove the plunger head and spring, and put on the new spring. Put the plunger back in, and either hot glue or duct tape the assembly back together. I put it back together, but it looked kind of weird, and I had to duct tape the barrel into place, and it ended up not being straight. I opened it back up, and cut off the screw places shown, and the top off the plastic piece. 
Now the barrel can go into the gun. I put it back together, and mine got 46’ flat with stock darts. I don’t have any stefans on me, so I haven’t tested it with them yet. The finished gun:
Questions, comments, corrections or flames?
