Need some opinions/ advice from some of you "gun hands"

The grey area is if you transfer it to someone else. if it's been a short time since the build was completed, it an get dicey. If it's a longer time, it's not as big of a deal. Problem is the time is subjective. The way I read it, is lets say I built one 10 years ago. I can transfer that to someone without problems as long as there was the initial intention to keep it when built. You do NOT want to be seen as manufacturing them for sale ....