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Register:
Seriously. That's all a Liberator is: a particularly crappy pipe, because
it is made of lots of laminated layers in a 3D printer. Attached to
the back of the pipe is a needlessly bulky and complicated mechanism
allowing you to bang a lump of plastic with a nail in it against the
end of the pipe.
An actual gun barrel is a strong, high quality pipe - almost always
made of steel or something equally good - capable of containing high
pressure gas. It has rifling down the inside, making it narrow enough
that the hard, tough lands actually cut into the soft bullet jacket
(too small for the bullet to actually move along, unless it is rammed
with massive force). At the back end there is a smooth-walled section,
slightly larger, into which a cartridge can be easily slipped.
(...)
It's not a gun. It's not even a 1950s style "zip gun": the pipe used
for zip guns is a lot better than you can make in a 3D printer, and is
correspondingly more effective - and safer.
(...)
Even so, we can expect a lot more cobblers to get said about the
Liberator, 3D printing etc in the near future.
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