That is incredibly fast.
So fast that ATF obviously made an error.
Did you include a gratuity with your F4?
I'm sitting on 20-30 Silencer Shop silencers whose Form 4's were submitted in December 2018.
__________________
Need a FFL in Dallas/Plano/Allen/Frisco/McKinney ? Just EMAIL me. $20 transfers ($10 for CHL, active military,police,fire or schoolteachers)
Plano, Texas...........the Gun Nut Capitol of Gun Culture, USA
https://www.youtube.com/watch?v=pELwCqz2JfE