Lineman73
Member
Here are photos of my full size M&P40 with the Storm Lake .40 S&W to 9mm conversion barrel. With two 9mm M&P magazines, I can now shoot cheaper 9mm ammo in my M&P40. The whole set up cost me around $150. I got the idea after I managed to get my hands on a whole case (500 rounds) of 9mm ammo for just $35!! It is fun to use, cool looking and is very accurate. What more could you ask for?? 










