Help in cleaning

I have a Hungarian Fegyvergyar-budapest 29m my Great Grandfather got from a German tank commander in North Africa but don't know how to take it apart to clean. Any ideas?
http://i770.photobucket.com/albums/x...l/CIMG1607.jpg
http://i770.photobucket.com/albums/x...l/CIMG1611.jpg
http://i770.photobucket.com/albums/x...l/CIMG1614.jpg
brokenimage

You might be better off contacting the NRA with this. I am sure they would be able to help.
Good luck.:smt1099