Absolutely. Once it’s built, I think it’s dumb not to register it.
There are no recordkeeping requirements on dispositions outside of the state, and they know their database is garbage. Registration just keeps you legal,
I don’t understand why you wouldn’t want to break an actual law by being afraid of violating the guidance.
If the gun is gone, and there is a knock at the door, the answer is very simple. I no longer have it, no I won’t tell you where it went.
That kind of response is 100% within the law.
If you want to keep the gun out of the states, database and stay legal the answer is simple. Don’t build it.
Now you are 100% in compliance with the law, the state doesn’t know about it, and yet you still have the ability to put something together if the world goes sideways.
One of the nice things about AR is that you can function test, and zero the intended upper on an existing built lower,