Reply #1: More sensational than anything.

[Atypical Liberal]

All this would really do is make it faster to get in trouble with the Feds by manufacturing receivers at home.

But more than this, most of these rapid prototype machines use resins that are not particularly durable. They are more robust than they used to be, but even so, most of the time the rapid prototype is used as a master to make a mold which can then have more durable materials poured into it.

There are some exotic rapid prototype "printing" technologies out there, such as ones that use lasers to sinter ceramics or even metal powder, but these are not going to be available to everyday people any time soon. You could buy an arsenal for the cost of the machinery.