10 Round magazines - NJ New Law
Same issue here! The 15 round mag for my M&P9mm 2.0C is now NJ non-compliant. They have allowed 180 days from date the law was effective (14JUN2018) to either destroy, surrender, or modify existing "high capacity" magazines. My LGSs have advised that they can modify the 15s to 10 and it is permanent. FSS in Whippany will do this for $10.00 per. RTSP in Randolph quoted $15.00. This is the route I will be taking (eventually).
Lew