Originally Posted by kernelkrink
A form 1 NFA item is exactly the same as one registered by an SOT FFL07 on a Form 2, the only difference is you paid the individual tax per item and the FFL paid the SOT for a years worth of production.
That's the answer I was looking for. I thought a Form 1 NFA worked that way but wanted to be sure. If I don't find a y556 receiver I'll finally get experience with a full heat treated bent blank. Thank you kernelkrink! Time to start researching what info is acceptable; and what isn't, when it comes to manufacturer info and serial number?!