I finally pick up my M&P9c on the 9th and I just have a quick question. From what I've read all I would need to make a 40S&W caliber conversion kit is a slide, barrel, and a magazine. Is this correct? I've searched but I haven't found a firm answer. I can't justify another $600 (California price w/tax & fees) for something that I wouldn't shoot that often. I can talk myself into spending $300 for an intermediate to fill the gap between 9mm and my 45s while I wait for the 45c to hit the market. Has anybody tried this or have first hand knowledge?