Dicks had a meltdown, for good reason.

[Fireball]

 Destroying those portions would require making new of the entire part. One can't simply weld pieces on to make it whole, because there would be too many machining operations required afterwards. If the portions are torched as you say, it would be an order of magnitude cheaper to simply buy a new gun. So, dirch is wrong yet again, in this case by the sin of omission. I don't feel like I have to check all his lies, but this is what happens when I don't.   Which is why I generally ignore him. Then again, his clarity was probably because he was quoting someone else's BS talking points.

You would not need to buy a new gun. Just the lower reciever.

Those can be bought at most gun shops for less than $75.

...

I used my Bushmaster lower when I bought my .450 Bushmaster upper. It's my new deer hunting rifle.

I got an Anderson Manufacturing reciever from a friend for some custom work I did for him. i then ordered a stock, buffer tube and internal parts kit and assembled a new lower for my .223 upper. Cost $150. It would have been another $50-75 if I had to buy the lower reciever.

No machining required.

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.