I'm thinking of building a new AR but this time I would like to build an SBR. I know I have to go through paperwork but what exactly would I need to do? The whole engraving/non-engraving is confusing me. Do I need to do the paperwork when I decide to build it or can I do the paperwork before hand? Is there any reason the ATF would not allow me to have the license for an SBR? If I get a license for an SBR is it the same license that allows me to own a suppressor or is that completely different?