I spoke to a local suppressor shop owner, who is one of the largest suppressor dealers in the midwest, a couple of moths back and he told me the government shutdown screwed up the ATF review teams.
He said the teams were mainly comprised of non-government contract employees, and that they transferred to “essential departments”during the shutdown because the fed was going to have to pay their contracts whether they worked or not.
I guess most of these contract employees did not come back to the review teams, so they had to train in a bunch of new people.
That in addition to the additional forms submitted during the shutdown have created a significant backup.