They reversed their previous decision.
They tested a non-functional one and expressed an opinion that IF it was what it appeared to be, it would be legal. They then tested a functional one and said it was not lawful.
Had they not "reversed" the decision, you would complain it was ambiguous with both an approval and denial.
You're clutching at straws.
But if locking it in a device makes it a full auto, then once someone locks it in a vice they have made a full auto firearm. If it is not full auto when not in the vice, then it is not full auto. If one has to lock it into the vice to make it full auto, then when it is not in the vice it is not full auto.
See a pattern here?
The pattern I see is that you are not familiar enough with this field to offer an opinion. You are again clutching at straws.
Especially as, using your language, if a person picks it up, it becomes a full auto. An argument like that could be used against any EXISTING bumpfire device. Please don't try to help. Don't try to "explain" or point out any "flaws" or "patterns." You will, at best, be arguing what Akins argued. That didn't work.
You said it was a FACT he was trying to circumvent the full auto law and that it was a FACT that he failed thereby making a full auto device. You do not know if it is a FACT of any of those details.
I do, in fact, know these facts.
To start with, ANYONE bumpfiring is trying to circumvent the full auto ban, in a legal way. The goal is a cyclic rate of fire well above that normally attainable by hand. That is de facto full auto, while attempting to remain semi de jure.
His method did not meet the criteria required by law, and has been declared full auto by the ONLY OFFICE IN THIS COUNTRY WITH LEGAL STANDING TO SAY SO. Therefore, de facto and de jure it is a full auto.
It is remotely possible a team of lawyers will be able to argue against de jure. But it ain't going to happen.
So those are the established facts.
No amount of nitpicking you attempt to make is going to prove or accomplish anything.
We are limited to a post facto discussion of where he went wrong. In simplest terms, he turned the stock into the trigger, and a single operation of said device makes it full auto.
Now, everyone trying to find a more effective bumpfire device: see what he did? Don't do that. Do something else.