If my image inserting skills don't fail me, here's how you remove the barrel and forearm. Drop the slide to unlock the action. After pushing the pin back through the end of the magazine tube, you use it as a lever to rotate the magazine. The magazinecan thenbe pulled out of the action. The whole magazine and barrel assembly will rotate 90 deg on interrupted threads and you can pull it away. These photos were of a Mod. 97 but the process is the same. http://i274.photobucket.com/albums/jj264/rock0552/DSCN0239.jpg
http://i274.photobucket.com/albums/jj264/rock0552/DSCN0240.jpg
http://i274.photobucket.com/albums/jj264/rock0552/DSCN0241.jpg