Just an FYI. My application for an SBR (e-filed in early January) was approved in mid May. I received an email with a PDF attachment of the approved form with the tax stamp image on it. I had thought that a hardcopy would be mailed to me. After six weeks, and no hardcopy, I called the ATF and was told that if you e-file, they do NOT send you a hardcopy. The PDF is the final form.