Got some +2 mag adapters:
I got these to try on my SR9 mags. They did fine, also found that they fit ony full size M&P 9 mags. I have got to the range but they do fit with no issues.
Those work on many more mags than the ones listed.
MEC-GAR PLUS 2 ADAPTER F42099-SET [F42099-SET +2 POLYMER BASE MAGS] - $9.95 : Greg Cote LLC
Greg Cote LLC MEC-GAR PLUS 2 ADAPTER F42099-SET [F42099-SET +2 POLYMER BASE MAGS] - Sorry, we don't ship the magazine +2 Adapters to customers with a billing or shipping address in states or jurisdictions that have a magazine capacity law. Mec-Gar plus 2 adapter and the special L-shaped magazine...
gregcotellc.com
I got these to try on my SR9 mags. They did fine, also found that they fit ony full size M&P 9 mags. I have got to the range but they do fit with no issues.
Those work on many more mags than the ones listed.