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View Diary: Abbreviated Pundit Round-up (74 comments)

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  •  ABS and PLA (9+ / 0-)

    Can make something that looks like a receiver, but nothing that would hold up reliably. ABS is the same material they use to make Legos, and that's the stronger of the two. Besides raw strength, the melting points of the plastics used by 3D printers is rather low. It has to be, since the plastics are melted from spools of filament and dotted into place. Its how (most) 3D printers work. Firing a bullet from a chamber made from any of this stuff is just going to absolutely make a holy mess of everything.  That you can fire one shot doesn't surprise me (after all, PVC will work for the barrel of a zip gun, just add rubber band and tack).  But it's not going to reliably fire a second, or a third. Not without the components being reduced to semi-random goo.

    Just the nature of 3D printing means it's a crappy gun (not to mention slow and expensive — I'd bet the print job for the components of Wilson’s gun takes at least a day, and the cost of filament alone probably exceeded the cost of a much more reliable weapon from the local pawn shop).

    There are plenty of people with the milling machines to cut components out of steel. So far as I'm aware, you can buy everything you need to make guns all day without raising an eyebrow. A 3D printer is at the bottom of my list for things that make guns.

    •  My concern is 12-year-olds (0+ / 0-)

      trying it and and severely injuring themselves in the process.

      But Mark you are right. In an age where you can detonate a bomb made from fireworks with a T.V. remote, plastic guns hardly seem the biggest threat.

      It is possible to read the history of this country as one long struggle to extend the liberties established in our Constitution to everyone in America. - Molly Ivins

      by se portland on Sun May 12, 2013 at 10:14:21 AM PDT

      [ Parent ]

    •  Its important , (0+ / 0-)

      a printer is easy to move around , not hard to buy , not hard to run , they are cheap .
      A milling machine is big bucks , even a small one .
      That the item is "printed" out of things that don't last isn't a problem , a throw away gun built in quantities is dangerous .
      http://en.wikipedia.org/...
      The problems with early printed guns will be designed around .
      Do you know of the plastic race car motor ?
      Polimotor ?

      To prove that his plastic powerplant was durable, Mr. Holtzberg campaigned a Lola racecar in the International Motor Sports Association’s Camel Lights series. Amoco Chemical provided financial backing to promote its Torlon plastic resin. The only mishap during half-a-dozen 1984 and 1985 races was the failure of a connecting rod, a part purchased from an outside supplier.

      http://en.wikipedia.org/...

      There are high end "printers" that can print with metal .
      http://www.extremetech.com/...

      Drop the name-calling MB 2/4/11 + Please try to use ratings properly! Kos 9/9/11 + Trusted Users have a responsibility to police the general tenor... Hunter 5/26/06

      by indycam on Sun May 12, 2013 at 10:15:08 AM PDT

      [ Parent ]

      •  Torlon is of a particular class of plastics (0+ / 0-)

        That are both extremely expensive and difficult to work with. Using them in a 3D printer would be problematic, as just the humidity in the air would be enough to make the parts too brittle to stand up.

        Again, a single shot weapon is very, very simple to make. I'll challenge any 3D printer anywhere that I can make single shot guns all day cheaper, faster, and more reliably.

        These things are not replicators.

        •  You don't see that progess will be made ? (0+ / 0-)

          You are thinking the development has run into a dead end ?

          I didn't say people could use Torlon in a printer today or that Torlon was the solution . I brought up the plastic motor to show that some things many would think impossible , are in fact more than possible .

           

          Drop the name-calling MB 2/4/11 + Please try to use ratings properly! Kos 9/9/11 + Trusted Users have a responsibility to police the general tenor... Hunter 5/26/06

          by indycam on Sun May 12, 2013 at 11:05:29 AM PDT

          [ Parent ]

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