This needs to be terminated, promptly..
There are a lot of people that have the blocks and presses to bend flat sheet metal into several types of eastern european rifle frames. AK's, MP5's, CETME, HK, & others.
AND IT'S LEGAL.. You can MAKE frames for personal use,, but you can not sell them, so easy (read: do your homework)
link to: one man's opinion
link to: bending flats
Along with the receiver made from bending flats, there are millions of imported de-mil'd parts kits..
Might be time to buy a bunch of kits to store for.. what ever??