I have had my 365 in 9mm for a couple years now and it remains unfired. I just checked the SIG site and the .380 conversion kits are back in stock (albeit very pricey). Dumb question time: will my 365 lower/module work OK with the .380 upper and mag (non-safety module on Conv kit)? Tomorrow is the 1st of the month & I can hit my retirement account for a coupla hundred My 9mm is the safety version ... Thanks!

According to member TrojanX4 from another thread, yes, but you will also need the .380 mag for it to work reliably.

quote:

Originally posted by TrojanX4:
I've done the switch. You can take the P365 .380 slide and swap out the existing 9mm slide. The 9mm mags will work with .380 ammo but not super reliably. I had a few stove pipes initially but besides that I was able to shoot about 100 rounds after that without a hitch. I would recommend getting .380 mags, but in a pinch the 9mm mags work well enough for the range.