re: 29b
There should be a big take-down screw on the left side of the receiver. Unscrew as far as it will go. Pull receiver and barrel forward... with the trigger guard and stock going back. Now to get the breechbolt assembly out, turn gun upside down and work action back and the breechbolt should lift up and can be pulled out. To get to the firing pin, turn the breechbolt upright (you should see a groove on top and a circle at the rear) There is a punch-pin right in front of the circle. Remove the punch-pin and the circle is the firing pin and it will come out. That is as much as I took apart this morning but would be happy to help you with anything else. I can probably scan some images if you need them.