From Ammoland:

Specifically, the bill would amend New York State’s public nuisance law to allow the state to prosecute the “sale or manufacture of products” as an activity considered to illegally or unreasonably “create or maintain a condition which endangers the safety or health of a considerable number of persons.”
While the language doesn’t mention firearms specifically, Myrie made clear in comments to the New York Daily News that guns are exactly the “products” he has in mind. “Every illegal gun on the street was a legally purchased gun at one time,” he said. Myrie continued: “In the wake of a gun violence epidemic plaguing the city, state, and nation, we have a duty to hold all responsible parties accountable.”