I have a full size M&P 40 (4.25" barrel) that I am thinking of converting to 9mm. I see conversion barrels listed from Storm Lake, and then I have heard that you can just install a factory 9mm barrel.
Have any of you done either conversion, and how did it work out ? Any other source of conversion barrels other than Storm Lake ?
Last edited by retired2006; 09-26-2016 at 10:17 AM.
Reason: Moved to M&P forum