I was just viewing some AR pics and noticed I had put the castle nut on backwards. I went to fix it, tried taking it off, and noticed one of the threads on the buffer tube was chipped, making it tough to take the nut off. I'm afraid if I try to force it off to turn it around more damage might occur. So my question is, does it matter which way the castle nut is installed? It seems like it serves the same purpose either way.