The real problem for those who would decry such manufacture, is that often the weapons that are the easiest to build are those most useful for overthrowing a dictatorial or overreaching criminal-political regime.
A semi smart person can easily build a gun from stock metal and a few machine tools...
I can build a very lethal close range .22 cal gun from a car antenna and a cloths pin in about 30 minutes.
The real problem for those who would decry such manufacture, is that often the weapons that are the easiest to build are those most useful for overthrowing a dictatorial or overreaching criminal-political regime.