Thread dimensions for HL Recoil barrel

[palepainter]

Tried the search engine with all the possible key words I could think of. No results. Does anyone know what the thread pitch or what size die I need to thread the barrel insert that screws into the recoil unit?

Thanks for any help at all.
PP

[MichaelC]

palepainter, I know that the HL barrel are threaded, but as far as I know, the recoil unit plug that it goes into is NOT threaded. It is just a plastic piece threaded by the barrel which is metal.

[palepainter]

Thanks so much Michael. I appreciate the assistance.