Yeah I was able to find the AAC in stock at kygunco (I believe they have another too) in Bardstown, Ky. My SAS had a long wait on the form 3 and it was not fun.
As far as hearing safe dry I am not sure. At factory stated 35-38 reduction it should be close. To be honest sound suppression wasn't what sold me on the tirant 9. It was in stock, has the same threads as a 22, and is user serviceable, and lite. it was just a better choice for me than the 45.