You may want to check further, as the 590 Raptor is not a shotgun.
Federally, no it is not, as federal law defines what constitutes a 'shotgun' for the purpose of clarifying and applying said federal laws. This unclassed 'firearm' is exempted because of a technical loophole, one that could easily be closed if congress was made aware of it.
Be that as it may, based upon a literal reading of the law, the Raptor is not considered a 'shotgun' by the ATF.
PA has no such technical definition of what a shotgun is, which would leave that determination up to the proverbial 'reasonable man' argument. Any judge, and most any jury, would consider the Raptor a 'shotgun.' And let's be honest - it is one to everyone but the ATF.