The 340 is bolt action so should be easy. I do have a 340BA which is similar. The models after 1968 are not in my interest so not as familiar with them. Are you having problems taking it apart or is there something broken? I have not seen a 340KC diagram but there are the previous model diagrams out there - 340k, 340KA etc. Not sure what the change was from KA to KC. - Bill