We now have the first M&P Shield .40 purpose built conversion barrels to convert the .40 Shield to 9mm. These have correct demensions for the .40 lug and the wider top to fit the .40 width chamber face without the slop of a Shield 9mm. These are shipping in around a week and are available at our website below for $209.99
We also carry Shield 9mm replacement and threaded barrels.
true precision