That could be a possibility, although I am not sure I would trust any of the local smiths in my small town, as I have called a couple in the past inquiring about a small task, and neither bothered to return my call.

Edit: Actually, on the CA compliant model that I have, I believe the flash hider is permanently attached, as having a threaded barrel in CA is a felonious offence. So, I do not think having my existing barrel threaded here in AZ is an option.