‘‘If we can spread this core technology to every kitchen tabletop, there will no longer be a meaningful way to restrict and infringe on the private civilian ownership of modern firearms.’’
Don’t test them. They will simply force the transfer of ANY gun part through an FFL dealer.
It won’t work.
Really.
OK, let’s say that they do this. This means that the amount of data required to be entered into the FFL’s book to transfer a rifle will explode upwards... with no benefit to anyone, least of all the BATF.
Further, the issue here is that anyone can make a lower with a 3D printer. Well, anyone can (and do) make lowers right now from castings. All you really need is a good drill press and some skill with a hand file. There are places you can get raw forgings or castings of a lower (or upper) for $30. Because these castings or forgings have no features necessary to the function of a gun (yet), they’re not serialized or controlled by the BATF.
You can then get a fixture to hold them in a vise on the drill press or mill and commence to removing the aluminum you don’t need.