I just bought an Arsenal SLR-106CR that I want to have SBR'd. The barrel needs to be cut to the proper length.

Since I can't cut a barrel myself, I'll need to send it off to have someone else do it. How does this paperwork process differ from me building one myself? Do I just do everything the same and then send it off to the person who will cut it? Who's name and city is engraved on the rifle?