I found this old 410 that went thru Katrina. Plan to turn into a squirrel gun. She aint pretty but with some cleaning and paint should do just fine for a backyard squirrel gun. From what I can find out it is an old CBC 410 made in brazil and imported thru Miami. When I went to tear apart and clean up last night I couldn't get barrel to separate from receiver. I tried driving the big pin out. I could only get it to go about a third of the way before it stopped. Tried from both sides. In the process I messed up the ejector and now it doesn't unlock and break like it should. The ejector and everything worked before I started. The first picture is not of my gun. But what it looked like many moons ago. How do I separate barrel from the receiver ?