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So I have a 8 yearbook 10/22 of th first generation of polymer trigger groups and that awful line-x like coating that is so popular. I have never cleaned it short of a boresnake and it finally started failing to chamber correctly. I went to remove the pins which simply fall out of my older 10/22s but these are really stuck! I am not sure if it's from shooting or that coating. I took my arbor press to it and couldn't drive them out - became worried about damaging the receiver as that pressure would have definitely broken a finger. Should I soak it in solvent or oil? Use a bigger hammer? Go nuts with the arbor press? I am thinking of making a wooden block to better support the receiver..