Noob question regarding NFA receivers
I was talking with someone the other day and explaining the process one must go through to own a pre-ban NFA firearm to a friend and this question came up: What if the receiver breaks? This got me thinking...
Please note that I'm not asking for advice nor am I planning on rebuilding one, I'm simply curious as to the laws themselves.
Say that you're firing a full-auto M16 and it, for sake of argument, explodes (or egg-holes irreparably, for you a-types). Your receiver is basically worthless and you no longer have a pre-ban NFA rifle. Can you rebuild the receiver? For instance, say it split PERFECTLY in two... can you forge it back into a full receiver using a mated piece? In other words, what extent can it be repaired to before it truly no longer qualifies as a pre-86 receiver.
Again, understand that I'm not asking if it's practical, or if it's cost-effective - I'm asking about the legal ramifications. I think questions like this will start arising once NFA guns start wearing out and the remaining supply wears even thinner.
"The underlying theory of gun control is the assumption that people can be perfect without God."