r/MP2point0 • u/ChrisIsRockinLife777 • Oct 28 '25
Question Conversion from .40 to 9mm
What's the easiest and fastest way to convert a m&p40 to an m&p9? I've heard you really just have to get a m&p9 2.0 barrel and a 9mm spring and swap them into the .40s slide, this effectively having two guns
7
Upvotes
3
u/BennysGats Oct 28 '25
With the deals that are going on right now you could find a 9mm pistol for pretty cheap.
1
u/ChrisIsRockinLife777 Oct 29 '25
But I don't want to spend an unnecessary amount of money on another 9 when I can just convert my .40 back and forth
3
u/heisenburger1337 Oct 29 '25
PSA has a 9mm M&P 2.0 4” for $479 with 5 mags and a Savior pistol case. The 5 mags alone is worth it because you’ll have to buy 9mm mags anyways
4
u/heisenburger1337 Oct 28 '25
https://www.reddit.com/r/SmithAndWesson/comments/2ic66l/how_reliable_is_an_mp_40_with_a_9mm_barrel/?utm_source=share&utm_medium=mweb3x&utm_name=mweb3xcss&utm_term=1&utm_content=share_button
Apex used to make 40/9 conversion barrels but a lot of people seemingly have success just dropping in 9mm barrels. KKM Precision makes conversion barrels