I'm trying to remove the FSB on my AR-15 and successfully got one of the taper pins out but the other one won't budge at all. After multiple tries, I think I altered the shape of the pin. I live in Hawaii and I've called three of the gun shops here and none of them will do this. One of the store owners said that he uses a blow torch and then punches them out, any experiences with this? Would using a drill help?