I have three 500's, a pre 1970 with one action bar and two post 1970 with two action bars and not aware of any rattles. Not that it matters but now I'll have to check them out. Just did and no rattles. I also checked out my 1966 Ithaca model 37 police, no rattles other then the sling swivels.
US Army 1953-1977
We, the People are the rightful masters of both Congress and the courts not to overthrow the Constitution, but to overthrow men who pervert the Constitution.