I have a James river armory early M14 with a 762mm firearms receiver that has problems. The firing pin slot in the receiver is to small and causes the bolt not to go back with the hammer down. There is a step in the receiver channel where the top rear of the bolt slides back and forth that caused deformation of the rear top of the bolt. The heel area of the receiver does not seem to be finished all the way. I need someone who can fix it for me. Any help will be appreciated. Thank You.