Originally Posted by
Gingerkid
I had the exact same question and decided to call BATFE last week to clear it up.
I explained that I was submitting a Form 1 to apply for making and registering an SBR via a trust. I asked if the firearm (existing lower) should be listed on the 'Schedule A' sent in along with the declaration of trust upon submitting the application. He said no, you are applying for ATF approval on making an SBR and that item would not be trust property until the trust is approved to own/register the property.
I recommend doing your own research, but that was my experience for what it's worth. Hope it helps.