Though current wait were running 6-9 months, Tax free form 1's for pistol braces are going to jam up the system for a while (unless it miraculously gets rescinded) if you submitted during that timeframe. The closer you submitted to the end of May deadline, the worse it's going to be.
My longest form 4 wait was 437 days, shortest was just under 90 days. My shortest e-file form1 was like 29 days. Don't recall if it was an SBR or my DIY .30CAL dedicated can on my 300BO. All on a trust.
437 days
Or 1 year, 2 months, 10 days including the end date.
Or 14 months, 10 days including the end date.
Miracle can.