Form 4 Suppressor:
22-Apr-16 Purchase
23-Apr-16 Mail Date
2-May-16 ATF Debit Date
11-Jan-17 Approval Date
24-Jan-17 Stamp arrived at Ark
About 8.5 months of processing time.
Form 1 SBR - I need to double check the timeline, but it was in the same general time period.
Form 1 SBR I filed online Tuesday, May 3rd, 2016. Approved and received emailed stamp on Thursday, October 27th. Was only 6 months. Sorry about that.
I really like www.nfatracker.com/ for keeping an eye on how long things are taking (and storing all my dates).