Being an “ammo mfg plant”, the ATF should have had jurisdiction and been first on the scene.
Any reason for them to suspend any of the FFL class licensees required to operate such a business in the U.S. would make them jump for joy at the justification of their existence.
Reminds me of the scene from Ghostbusters when the EPA guys says’ “If he does that again you can shoot him.”
But they aren't an ammo manufacturing plant. They are, in effect, a recycling company. They don't make ammunition, they don't deal with explosives. They clean up old brass, which they probably buy mostly from the military. The administration tried to shut down sales of fired military brass to such recyclers, a few years ago, but that sort of blew up in their faces. They wanted the stuff melted down.