[cs123]

Pretty interesting problem for authorities with the advent of 3d printers.

http://www.news.com.au/news/d-printe...-1226437387272

Australian Popular Science reports an amateur gunsmith using the name "HaveBlue" has made a fully operational 0.22 caliber pistol and parts of an AR-15 assault rifle.
He announced in online forums that he had tested the pistol - made from a chunk of plastic feedstock into a commercially-available 3D printer - by successfully firing over 200 rounds. He also has posted video on Google videos of the test firing of an AR-45 variant of an AR-15 assault rifle assembled largely from printed components.
HaveBlue has also posted a template for a major component of an AR-15 assault rifle to a 3D printing website. Despite internal wrangling over the legality of the post, his template for an assault rifle component was still recently linked on a Thingiverse profile page.
3D printers have exploded in popularity over the past year or two as the devices - once solely the domain of large commerical operations - entered the home domestic market.
In 2003, a 3D printer cost $40,000. Now, you can buy a home model for a little more than $1000.
The printers create solid plastic object in any shape you specify, and have previously been used to create plastic prototypes of commercial objects. However, with the advent of the home printer, they are used to print everything from toy soldiers, lego pieces, bathroom hooks, furniture pieces ... even replaceable parts for home electrical appliances.
And you don't need to design the objects yourselves. Large databases are already appearing online

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