For the same reason that there are only 8 on the list - lack of demand.Id take at least two.
How is it you can get a threaded barrel for all other calibers of the usp compact, but not 9mm? I dont get it. - AND- Why are these companies that make quality products (Jarvis, FireDragon) opposed to manufacturing 9mm threaded barrels?
Why don't you share them here...?Thread Hijack -
I've got an EFK one for sale on the Marketplace
ALSO, if you are using an ACC Evolution you may want to pm. There are some things to consider with a USP Compact and ACC Evolution Suppressor. (Which by the way is a great suppressor)