While you are on the site, in your browser find and click "Add to Home Screen" A CGN beaver app icon will then be created to your phone that is directly link to the site.
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You can call Remington at 1-800-243-9700 and go thru the menu selection. One of the menu options is to request information on your Remington based off the serial number. You read off your serial number and the guy looks up in the database the year the gun was made and what the original barrel was for that gun (if gun had barrel options like shotguns do)
islquest is right. I phoned Remington to get the year of manufacture for my pre 1911 Model 11, or more properly, Remington Autoloading Shotgun. But for firearms made in 1921 or later, this chart has the answers.