That's the easy part:From the Forbes article:
"In this case, by contrast, Wilson is literally an arms distributor. "
Oh, really?
How exactly is distributing blueprints equivalent to distributing arms, especially for a primitive design like their pistol?
They can declare things as "munitions" and add them to the list (which is what they are evidently doing as we speak - "making a final determination"). Once your item is on the USML, you are subject to their regulation of distribution.
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IIRC, public opinion caused them to drop the issue.It's not a perfect plan; just one that worked back then.