New York is one of a number of states where microstamping legislation has been introduced. California and the District of Columbia have passed such legislation, though neither has implemented the law. In fact, in the District of Columbia the police chief Kathy Lanier and Josh Hortwitz, an antigun advocated with the Coalition to Stop Gun Violence (CSGV), both testified in opposition to implementing microstamping.
I find it hard to believe that anyone still considers microstamping a viable technology. Maryland tried it for a decade and never solved a case with it. It's expensive to implement and easy to defeat. Just normal wear and tear renders it useless.