I heard back from my congressman today. They weren't very helpful and said they cannot push constituents to the front of the line, but they did pass along the atf response letter to my request.
Good Morning _____,
ATF received an ATF Form 4 application for Mr. _______ on August 1, 2018. The processing time for a perfected ATF Form 4 application is at least 10 months due to a number of factors, to include; the implementation of the 41F Final Rule, which requires ATF to perform full criminal background checks on all individuals who are identified as a Responsible Persons of a trust or legal entity, there have been changes to various state laws which have in the past disallowed possession of certain NFA firearms and now those states are enacting legislation which would now allow possession and the volume of silencer transfers has increased tremendously. In fiscal year 2007, ATF processed nearly 66,736 NFA applications. In 2016, ATF received more than 379,410 applications, in 2017 ATF received 386,210 applications, and in 2018 ATF received 339,278 applications. Prior to the shutdown the processing time for ATF Form 4, was 7 months, however; at this time ATF is experiencing over a 125,000 backlog and therefore the processing time is expected to be in excess of 10 months. ATF has and will expeditiously continue to process these applications to reduce any existing backlog. An unperfected ATF Form 4 that needs corrections will take longer than 10 months to process.
At this time ATF is processing applications that were received in May 2018, therefore; Mr. ________ still has a few months pending.
according to reddit/nfa, people are receiving stamps that were submitted mid-may 2018.