You mean a block of steel/aluminum/etc.?
That's cool.
But I'd also like to caution everyone with this little tidbit of advice. If you are buying one of these so that it is not "traceable" and cannot be "confiscated" when/if the time comes, then please, don't keep it next to your other weapons that you did buy on a form 4473. I think that if they are coming for your guns, they are going to take all of them that they see, whether or not it has a serial number on it or not.
I guess what I am really saying is that "invisible" to the ATF does not actually make your gun invisible IRL.
FWIW
No, they are 0% forgings. So, basic shape. everything else I milled.