No mention I saw of the origin of most of these devices in this article or most I've seen recently about these. Perhaps if our government spent more time working on the border and confronting China over allowing these to be manufactured there and sent here it wouldn't be quite such an issue. I understand some may be 3D printed or made here, but when these started to become a thing they were being imported from China.
There has also been speculation that a lot of the sales of these were stings by the ATF. Perhaps the ATF has lost control of another of their projects a la Fast and Furious?