They are already called "illegal firearms" even in this video clip and even parts that were raided and confiscated were referred to as illegal. So there is that. As to these firearms being more accessible, untraceable, and on the lose is quite an accomplishment indeed. Even though once it is illegal to possess firearm - what does it matter whether you put it together from parts or purchased it around the corner. In both cases it makes you a criminal according to the law.