Thank you for your actual help and not the condescending replies like the other guy who apparently need to feel superior to someone on a thread asking for help. I do appreciate it.
Yes I googled it prior to posting.
Barsto’s only has a barrel option that needs to be milled out which doesn’t help me.
EFK only has one .40 barrel and it’s for the tactical 5inch model that doesn’t help me.
So I’m still looking for the correct barrel.