I've read this in several places, but thought that I'd consult you guys before I even attempt it. I have a Taurus PT92 (9mm) and I've been told that I can swap out the barrel and mag for .40S&W parts and be able to swap back and forth between 9mm and .40. I can get a .40 barrel for $70 and a .40 mag for $30. Is this true? Does this simple conversion work, or have I been trolled?