Marlin 39a question
Recently purchased a Marlin 39a S# 5158. The gun is in great shape but the white spacer between the end of the stock and plastic butt plate seems to have shrunk. It is about 1/8" smaller on all sides than the stock and butt plate. It appears to be plastic so I am trying to figure out how it shrunk. Any ideas as to what might be going on and where I can get a new one? Thanks.