I am going to build an MP5, bend my own receiver and make it from scratch. The first form 1 was denied because I accidentally scanned the blank side of a form instead of the front side, that was my bad! lol I filed a second time and made sure all the forms were correctly scanned and double checked my documents before I sent it in, all was good. I am no noob to this, but I am not above making a mistake, see above! So, 8 weeks go by and I get an email saying I was denied because my manufacturer address was not correct. I selected MFI(manufactured form 1) and used the drop down to select MP5 as the model. If I am the manufacturer, there is no address to have in box 4A, there is also no place on the Eform1 to put an address as the manufacturer if you use MFI. I have checked over and compared it to my other approved forms and can find no faults. All of my responsible person forms had my trust and address as the maker of the SBR as well, which is exactly how I have down all the other items I have form1. My thought is I did everything correctly but the examiner saw the MP5 listed as the model and thought I should have HK and their address listed in box 4A? I called the ATF and they are no help. I believe emailing an "expert" and asking them is a waste of time because I am still waiting on a response from a question I had in January. Should I submit again with all the same info, or for a model put N/A? Appreciate the help and Pew pew on!