Hello, I am having a real tough time sorting this one out. I recently acquired this Marlin 39A ser # 25xxxxxx made in 1975. It overall appears to be in nice shape however the lever will not open the bolt more than about 1/2 an inch at the most. I took the gun apart and found a broken tip on the carrier rocker which I replaced but this did not help. I think perhaps it was broken by someone trying to force the gun open. I have looked at all the other internal parts and cannot find anything else that stands out to me. No doubt I am missing something here. I have included a couple of pictures. Like I said the lever will open partway and then it is a hard stop, and it will close all the way, but that is all the travel it will allow. I have tried it with the ejector assembly removed from the gun and it does the same thing. I have tried with the mag tube out of the gun as in the picture, same thing. I have tried it will the firing pin removed and it won't even travel this far. Thank you in advance for any help.