Looking to streamline a build I have been contemplating. If I wanted to machine an 80% ar lower and NFA as an SBR under a trust, would I put the trust under purchaser information and my personal information as seller information? I'm not sure how to handle this without seeing a hole for the fine state of massachusetts to thoroughly bone me through. Generally speaking, how does one FA10 a self-made firearm? Do I need to do this as a two-step process, or can I get it done in one step? This is just the MA end of things, I know the steps with the feds for the NFA business. Thanks for your help.