I have been having some issues with the bolt my Mossberg 46b,so I took it to my local Gunsmith and he said that he couldn't fix it and I should just buy another Mossberg and just transfer the bolt over. There is a Mossberg 42mc that's for sale on a gun website and the bolt on the 42mc looks just like the bolt on the 46b. Are the parts compatible on both models? I know they didn't make a whole lot of these guns so not very many people know much about them but any help is appreciated.