If they're building it from a Marlin Rifle, it would be an SBR and a no go in NY.
The other versions, like in the link are handguns from the start and legal. They don't need to meet any weight requirements for NY because they're not semi auto.
The other versions, like in the link are handguns from the start and legal. They don't need to meet any weight requirements for NY because they're not semi auto.