Where did you get the adapter from? I am trying to find a AR stock adapter for my side folder. I have not replaced one before, but I used to work on aircraft and have removed some tight pins. An air hammer or rivet gun with a punch adapter works great. Also, if you you can adapt a a ball joint press, this may be the answer too. I have pressed out tons of corroded and frozen pins. I have seen pictures of staked pins on the VEPR 12 side folders. My thought would be to press it out. Like I said, I have never done this job before, but I feel there are several tools that could make it easi