Step 5: The Basics: part 5 squigees
all you have to do is unscrew your barrel, and put the end of your squigee into it. Then, grab the end from the other side, and pull. Then just screw your barrel back onto your gun.
squigees are pretty cheap, and there are different types. The kind that i just covered is the one that will come with your 98 custom, a pull through.