Ah, you didn't read the link I gave. (Don't blame you, it's painful reading.)
NY and NYC define shotguns as having smooth bores. Rifled-bore shotguns are not legally shotguns in these jurisdictions - in fact, they are not anything recognized by law. All prohibitions refer to rifles, shotguns, firearms, machineguns, or disguised guns - none of which are legally defined to cover "slug guns". I know it's a strange concept, but I've poured over the laws, and it's true - because NY & NYC do not define things the same way that normal people do.
That said, don't give cops any reason to take notice of it. Cops are tasked with apprehending anyone they THINK is breaking the law; it's not their job to understand the nuances and limitations of law. Sure the system will try to slam you; that's why you must know the law before you do anything. Know the law well, and don't give the authorities any reason to pay attention to you.
NY and NYC define shotguns as having smooth bores. Rifled-bore shotguns are not legally shotguns in these jurisdictions - in fact, they are not anything recognized by law. All prohibitions refer to rifles, shotguns, firearms, machineguns, or disguised guns - none of which are legally defined to cover "slug guns". I know it's a strange concept, but I've poured over the laws, and it's true - because NY & NYC do not define things the same way that normal people do.
That said, don't give cops any reason to take notice of it. Cops are tasked with apprehending anyone they THINK is breaking the law; it's not their job to understand the nuances and limitations of law. Sure the system will try to slam you; that's why you must know the law before you do anything. Know the law well, and don't give the authorities any reason to pay attention to you.