I for one can't even begin to sympathize with Larry. And this isn't really about the NFA.
The dude is a Delta veteran who was working with a Russian company to help them evade US sanctions, getting paid handsomely by said Russian company, and flaunting the relationship on YouTube for views.
He got caught because he was also working with a bunch of other FFLs and corrupt cops, including a DHS analyst with an import business called Trident LLC (who was the initial target of the investigation) to use fraudulent law letters to import and resell guns that were banned from importation by the GCA of '68. Most of them weren't even machineguns.
Some of these guns were shipped to a non-dealer (in AZ, I think) and sold on the black market for higher prices than they would have brought through legitimate channels (which is what brought attention to import business).
This is a game that most of us can't even begin to think about playing because you need an import business, plus CLEOs and FFL/SOTs involved, and the cash to import the expensive toys. When Larry got himself raided for being a part of it, the Feds only then realized he'd been getting paid by Kalashnikov for years to help them work around US Sanctions.
And knowing that he did all of these things, Larry somehow still expects Wilson to stand by him at the risk of damaging Bill's legitimate firearms business. Larry sounds like he's as a shitty a friend as he is a criminal.
None of those choices make Larry seem like a sympathetic character to me. He's no Robin Hood, and he just comes off as an opportunistic slime ball.
And for the record, and obligatory 2A purity test, the NFA and GCA are both unconstitutional and need to be abolished.