MSR Pistol Designation In Doubt?

[grayfox]

Of which all of this is a violation of the APA, Administrative Procedures Act, but to get that into effect somebody has to sue them.
Vague, uncertain, private and reg's put into effect without public notice, comment, and etc procedures is straightforward to smack down in court.
But somebody has to take them there.
Maybe with more of President Trump's new federal judges in place, this might be easier to do.
How big is "too big" I doubt if I can hold and fire a 454 casull with just one hand.
What is a rifle sight? this is an undefined term.

But yeah, more of the same-o same-o from the deep state snakes.