That isn't a thing in NY - at least the state, I cannot vouch for NYC which is totally separate from the rest of the state regarding requirements. I've ordered both 10-round and 15+ round versions and have had the FFL pin the mags.
One thing I forgot to mention about 10 round factory mags - for the M&P models anyway...
The Compact version will take mags of the "Fullsize" but it requires a "sleeve" to prevent over-insertion (everyone hates that). Well, on the factory 10-rounders, they have a different "base" of the mag to prevent converting to standard capacity. This means the "sleeve" will slide around and not work well. On the regular 17-rounder (pinned to 10) this isn't an issue.
I have separate mags for the fullsize and compact, but I know some people like the option for cross compatibility. Just FYI.