There isn't a roll pin.
Here is the schematic. http://www.gunpartscorp.com/Manufacture ... -41832.htm
Make sure the chamber is empty and the bolt is closed.
Remove the recoil pad, and then remove items 69, 71 and 70. You need a 3/4" socket for the nut (item 69).
Remove the butt stock.
Then, find a dowel or other similar tool about 3/8" in diameter, and use it to push in on item 3.
This will take the tension off of the pin (item 4) and allow it to slide out.
The spring is under tension. Once the pin is out, the only thing keeping the spring in the tube is the dowel that you are pushing on. So, when you back the dowel out, be careful not to let the spring fly out and put out an eye.