Been searching for info on a 500 B that I plan to rebuild. Its been a cold winter here in Michigan and was looking for a winter project. Picked up a 500 B that needs some help. I am so happy to see this place and hopefully get some help with questions i have. One of the biggest questions is did Mossberg use 12 guage parts on the 16 guage other than the obvious barrel. things like the slide action tube,butt stock ,forend etc. Any help would be much appreciated!