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Discussion Starter · #1 ·
I was wondering if anyone knew if you could swap the barrel from a 40c into a 9c. I currently own the 9c and if I could obtain a .40 cal barrel and mags, would they work in the 9c frame? I've heard of other makes of guns that you can do this on and was wondering if it will work for the M&P. I looked back a few pages and couldn't find anything on it, even did a search of the forum and came up empty handed.
 

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AFIK... The M&P was designed with the .40 in mind (unlike some other pistils) and frame size on the 9mm and .40 is the same, so barrels should interchange. You will, of course, need new mags.



Someone with more knowlege should be able to confirm or deny that soon.
 

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With a kit you can go from 40 TO a 9mm - but can not go from a 9MM to a 40.



I have a 9c and a 40 - I had both apart cleaning them and - just for the heck of it tried to stick the 40 barrel in the 9MM slide - it will not fit - too small - the chamber part of the barrel - where it shows through the slide - is bigger on a 40 than it is on a 9MM.
 

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Discussion Starter · #6 ·
Yeah, I kind of thought that the 9, .40 and .357 would have roughly the same outer diameter, but I guess not. Oh well, guess I'll just have to break down here eventually and buy one in .40 as well.
 
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