Originally Posted by cjwils
You can also ship interstate without going through an FFL when you ship a firearm back to the manufacturer for repair, and when they ship it back to you. (Although maybe the law considers the manufacturer to an FFL, I don't know about that.)...
The only reason that you could legally do that is because the manufacturer has an FFL. Gunsmiths also have FFLs.
And they can ship the gun back to you directly because they have FFLs and the law specifically permits it.