This is an option if you have been waiting over the ATF’s stated turnaround time.
We had a customer reach out to their local official found on: https://iga.in.gov/information/find-legislators
Then send them a message using this template. It may need to be modified a bit depending on your situation.
“My name is XXX of (City, State). I’ve been waiting on the NFA for XXX days now to approve me to possess a firearm suppressor I purchased back in (Month, Year). Oftentimes, there are hold-ups in the FBI background check portion of the approval and, as an individual, the NFA hotline won’t give out any information as to what the delay is caused by. If there is any way you would be able to inquire on my behalf with both the ATF or FBI, I would greatly appreciate it. The case may also be listed under my trust name, “(Trust name)”. If there is a more appropriate avenue to have this looked into, please let me know. Also, if there are any release forms or additional information needed for the process, please contact me.”
He got approved just a few days later!