That’s a funny part, from my perspective. Jiminez was a convicted felon buying a lower off an undercover agent in a parking lot. From the opinion:
As a last gambit, the Government says that Jimenez simply must have known what he was doing was illegal based on a conversation he had with one of the undercover agents. But that is pure ipse dixit, as the cited transcript shows:
Defendant: It's legal right now?
UC: What do you mean `it's legal right now'?
Defendant: Yeah, like I could do it. Like I could take it to the range right now and test it out.
UC: That right there's a fucking machinegun. You take that to the range you're gonna draw all kinds of attention.
Dkt. No. 13 at 3. Nothing here shows that Jimenez knew the lower receiver would be deemed illegal; to the contrary, he appears to think he was buying a legal item, and the undercover agent certainly did not clearly apprise him otherwise.