You are correct!
The Barrel information I posted was incorrect. I had a brain Fart! My mind set was on thinking of the Remington 870 Special Purpose barrels and not the standard barrels. All of the Standard Barrels of the same gage will fit on the express and you were right on regarding the tube. Thanks!
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment