Purchased a 9mm suppressor last April, got the deny letter last week indicating an address problem on the application filed by the FFL, and refunded my $200 they had for almost 9 months. The FFL went over it, no issues, the application address info is the exact same as the three approved NFA items I have. There is no reason to deny it. The FFL called, they can no longer call, must be emailed and they will get to it when they get to it, which is probably never. So, be prepared for you NFA items to not go through in this hostile administration.