Looking to get a caliber xchange kit for my 320. Want to change my 357 sig compact to 9mm.
My question is does anyone know if the kits fit a 320 that hasn't had the sig upgrade? I had grayguns do a competition kit and flat trigger on my 320 and I don't want to change a thing cause it's about the sweetest shooter I have. Want to conveet to 9mm but some guys at the range told me that the conversions only work with the new upgraded 320 and not the old ones.
Anyone know for sure ?

Thanks for any info.

I believe an upgraded slide WILL work with a non-upgraded FCU, as the only difference is a small milled out section to accommodate the disconnect.

An upgraded FCU will NOT work with a non-upgraded slide, due to the lack of the milled section.

So you should be good to go whichever slide you pick up.

^^^ THIS, For Sure!

OK great. Thanks!

Interest in a trade? Email in profile.

Yes it will work.