Dicks had a meltdown, for good reason.

[BrianSoddingBoru4]

OK, the impression I got from Anomalocaris' post (the mount for the barrel, the trigger group, and the bolt carrier) is that not just the lower gets the torch. Did I misunderstand it? Does what is destroyed only involve the lower? If so, it's a joke. I don't know what to believe, atm. Not being all that familiar. I do have some firearms, but they're just pop guns like a .22 semi-auto and a pistol or two, and a .22 pump...and a 12-ga breech loader. Might be some more. I'd have to go stroke the dial on the gun safe to be certain. 

Oh, yeah, there is also a neat little .32 ACP with the latest patent # from 1929. Shit, I'm one of them. Guess I need to go climb into a bell tower and ejaculate some lead. 

You sorta got it right - the wrong way.

The trigger group is  the lower reciever. The barrel mount and bolt carrier are parts of the upper and not serialized. If I am not mistaken ATF does not want them torch cut - but bandsaw cut. Reason - they want to be able to identify the unusable parts. If you used a torch - it would make a puddle. Hard to identify a puddle.

But - all the internal parts, buffer tube, stock - and the entire upper can be salvaged and sold as parts.

Upper recievers can be bought and sold with no FFL paperwork. Only the lower requires a 4473.

The ATF actually specifies a torch for this sort of work.  From the relevant page:

Each cut must completely sever the receiver in the area indicated by the diagonal lines.
 

[*]The receiver must be completely severed in each area indicated with a diagonal torch cut.
 
[*]Cutting by means of a band saw or cut-off wheel does not ensure destruction.

[*]


Boru