Smith357
US Veteran
You can tell if it has had the modification buy looking inside the yoke for an M stamp near the model number. No M stamp, not modified.
I like them all, the 14 Masterpiece and 15 Combat Masterpiece have adjustable sights while the 10 M&P has fixed sights regulated for 158 grain bullets.What do you think of the 10/14/15's and where can I find them?