So here is how I did it.
What you will need:
Dremel(with a cutting blade and sanding drum)
2.5-3 inches of cpvc
a spring that will fir into the blaster
adhesive
thick adhesive(hot glue epoxy putty ect.)
sealent adhesive
and the most obviously a screw driver for the screws and the blaster
So here is the blaster


So first you will need to take the plunger out of the blaster by taking out the four screws in the bottom. Unscrew the plunger head and put the spring on. You have a choice of replacing or adding a spring. I chose to add a spring that was a pump return spring from an air soft gun I think.

After that we are now going to give it a nice barrel of CPVC. First thing you will need to do is cut here on the blaster. Be careful when you cut because of the AR spring is in there.

After cutting there clean it up to your specifications.

After you clean it up you will get your piece of CPVC and apply excessive amount of the thick adhesive and stick the CPVC into the space you made. Make sure you get it as straight as you can you may want to rap it in Electrical Tape so it fits snuggly and you can get it straighter easier. I did not do that.

When you finished that and you adhesive has dried set or whatever put a sealant over it to ensure a good seal. Then put it all back together. And you are finished.

Ranges vary between 50-65 ft. with stock darts of all types.
Questions and concerns or advice please comment
Thank You for looking.