OP here. I was so encouraged by my Form 1 getting approved in a day that I hurried up and bought a 5.56 suppressor from Silencer Shop (YHM Turbo K RB). I made the purchase on March 19th and it took almost a month for the Form 3 to go through plus shipping to my local dealer. I just went in today and certified my Form 4, so hopefully this one goes quickly as well.