On 8 Feb 2014 at 5:39, wrote:
> A second thought about ballistics. If a 3Dimager could make a
> duplicate barrel of a handgun used in a armed robbery how would the
> police use ballistics anymore to trace the handgun back, now to a
> number of owners?, ouch.
The barrels of guns straight from the factory are non-identical in
the micro details of the rifling. And they wear differently. That's
how they match buullets to barrels. By those microscopic differences.
There's no reason that 3d printed barrels would be any more
identical (and some reason to believe they'd be *less* identical).
Once you get to the level of fabers/replicators, where each *atom* is
placed individually then it might be a problem. but when you are
building stuff to merely thousandth of an inch tolerances, they
aren't going to be all that identical. Interchangeable parts, yes.
Identical parts, no.
--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com
> A second thought about ballistics. If a 3Dimager could make a
> duplicate barrel of a handgun used in a armed robbery how would the
> police use ballistics anymore to trace the handgun back, now to a
> number of owners?, ouch.
The barrels of guns straight from the factory are non-identical in
the micro details of the rifling. And they wear differently. That's
how they match buullets to barrels. By those microscopic differences.
There's no reason that 3d printed barrels would be any more
identical (and some reason to believe they'd be *less* identical).
Once you get to the level of fabers/replicators, where each *atom* is
placed individually then it might be a problem. but when you are
building stuff to merely thousandth of an inch tolerances, they
aren't going to be all that identical. Interchangeable parts, yes.
Identical parts, no.
--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com