I'm confused by this...in my form 1 instructions it says: if an existing firearm is being modified into an NFA firearm, enter the existing serial number and the address of the original manuf. If the NFA firearm is being made from parts, enter my name and address.

...now doesn't this mean if I am registering my existing serialed firearm that was manufactured by doublestar, I don't need to have anything engraved on it because I wasn't the one who manufactured it, just the one registering it? I've been told I will need to engrave my lower with my name and address because I will be the manufacturer when I SBR it. I don't understand.