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P365 9mm/380 interchange

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December 19, 2023, 02:49 PM
gjgalligan
P365 9mm/380 interchange
I have a 365 in 9mm and wondered if I a 380 barrel
would fit in the slide?
Might need different mags and spring maybe?


Integrity is doing the right thing, even when nobody is looking.
December 19, 2023, 04:42 PM
pedropcola
No. You need a complete upper. Mags would work I believe.
December 19, 2023, 07:06 PM
Stroonz
The slide on the 9mm is heavier than that on the 380; as such you would likely have many jams. The 380 slide has three holes to lighten it that are visble if you turn the slide over; in addition the recoil spring for the 380 is lighter.

I actually ran a whole mag of 380 rounds using 9mm magazine with no problems.

The mag for the 380 is identical to the 9 except for a spacer built into the inside back to make up for the smaller 380 cartridge

I love the 365/380 and have adopted it as my daily carry since I do have arthritis in my hands and 380 is pleasant to rack and shoot