In short no it is not but in the other case it is from 40 cal to 9mm.
You can buy a 40 and convert either to a 9mm or a 357SIG which is what I have done with my S&W M&P40C using a Storm Lake 357SIG barrel which I just tested this afternoon at the range and was very impressed. I also have a post about why you should buy a compact M&P and most of all a M&P40C for this versatility!
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59,M&P9,40,40C,357,(2)45,G26
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