S&W M&P9 conversion to .357sig - possible?

[Sir_Macadoo]

I've seen a lot of talk of converting a S&W M&P40/.357sig down to 9mm. Can you do the reverse?

Storm lake sells .357sig barrles, can you drop those into a M&P9 and with the right mag use it? Can the M&P9 frame handle the beefier round?

Thanks.

 

[vellnueve]

Frame is identical. Slide is not.

 

[Sir_Macadoo]

Thanks Vellnueve. Is that a 'no?'

 

[wolf223]

you may be able to get a slide, barrel and internals for the M&P40 or M&P357 and slap it on.

i am not sure of the parts differences in the 9mm from the 40 / 357 frams though

http://mp-pistol.com/boards/

l

 

[vellnueve]

That's a no for a simple barrel swap. If you get a complete upper half, you can do it (I use my M&P9 slide on my M&P40 all the time and vice versa) but buying an extra slide just to do this is a tad bit overkill.

 

[Sir_Macadoo]

Thanks for all the info. I totally agree. I was only going to pursue this if it were as easy as a semi drop-in barrel.

Thanks everyone!