Thread: AR15 Questions

Hey everyone, I have a question about my new ar. I have a factory assembled Aero Precision M4E1 lower and the castle nut that locks the buffer appears to be staked (dot punch on the detent plate int the castle nut). I want to fit a sling plate, which means I need to remove this. I have tried to undo it using the tool, but I feel like I am going to break the magwell (using a mag vice to hold it)

Whats the best method for getting the castle nut off with minimal damage? I don't even mind buying a new nut if its going to be destructive, just want to save the buffer tube etc. I can go take pics if I havent explained it well.