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ATF Tests Show 3D Printed Guns Can Explode

Lucas123 writes "The ATF has been testing 3D printed guns over the past year and, not surprisingly, has found that depending on the thermoplastics, 3D printers and CAD designs used, some can explode on the first attempt to shoot them. The ATF published videos this week of the tests on YouTube showing what looked like a Liberator model of a 3D gun exploding upon being fired. Another model, created with the popular ABS polymer and an advanced printer, could fire as many as 8 shots. The tests were published at a time when a law passed in 1988 banning the sale of guns made entirely of plastic is set to expire next month." I hope they post the videos when they do the same tests on Solid Concepts' 1911.

29 of 233 comments (clear)

  1. do tell by turkeydance · · Score: 5, Insightful

    metal guns explode, too.

    1. Re:do tell by cayenne8 · · Score: 4, Funny

      Is this the same federal govt that developed movies and campaigns saying that smoking pot would cause you to go insane, kill and rape people?

      --
      Light travels faster than sound. This is why some people appear bright until you hear them speak.........
    2. Re:do tell by mlts · · Score: 2

      Put too hot a round into almost any firearm, be it plastic, metal, or whatever, and it will explode.

      I think this is really a non-issue. The Liberator was a proof of concept more than anything else. Of course, the technology will get better, but the only way one would use a 3D printed plastic pistol is if they had no other recourse.

      The real tests I'm curious about, would be the Solid Concept's 1911. I wonder how well sintered metal will take a high round count. Since the 1911 was made back when metal technology was fairly primitive, it might just be that the metal stereolithography (what 3D printing was called before it was called 3D printing) process is good enough. Plus, shooting a .45 round puts a lot more pressure on components than a .22 or .25.

    3. Re:do tell by Bill_the_Engineer · · Score: 4, Interesting

      LOL. Seriously though, "Reefer Madness" was financed by a church group.

      --
      These comments are my own and do not necessarily reflect the views or opinions of my employer or colleagues...
    4. Re:do tell by QA · · Score: 2

      I used to belong to a gun club. Competitive Bull's-eye shooter here.

      I've seen the top strap of a S&W model 686 (Stainless Steel 6" barrel .357 Magnum revolver) get peeled back due to an "explosion". The top of the cylinder was blown open, then the top strap was blown upwards and back.
      Now a revolver is inherently stronger than an automatic in most cases, and Smith & Wesson is a well manufactured pistol, but do you know what caused it? It was caused by a squib load.
      A squib load is not enough powder in the case. Lets say you were hand loading your own cartridges and you were measuring out 14 grains of powder, but instead only put 4 grains in. Now, instead of a controlled burn (which is how firearm cartridges work) you really DO have an explosion. Too much pressure, probably in excess of 50,000 PSI, way too fast. Boom goes your handgun.
      So, I don't have a tinfoil hat on, but things may not always be as they seem.

    5. Re:do tell by fermion · · Score: 2

      Yes, and the same federal government that says hospitals cannot deny care to an injured person, and sets a policy that gun shots must be investigated. If we lived in a world where parents accidentally shot their kid, and if they did not have a way to pay for treatment, the parents had to find a way to a way to treat the kid not at the taxpayer expense, and the taxpayer were not paying police to investigate it, then the argument would be fair. The problem with dope, and even crack and meth, is that the taxpayer is paying huge amounts to do basically nothing. OTOH, the taxpayer will likely be on the hook when a gun explodes, so doing tests for guns that routinely explode is beneficial to everyone. It like testing cars for flaws. Sure, cars will roll over, but we really don't want cars that roll over by design.

      --
      "She's a scientist and a lesbian. She's not going to let it slide." Orphan Black
    6. Re:do tell by poopdeville · · Score: 3, Insightful

      That's nice and all, but... use Bayes theorem. If you get statistically significant results, let us know.

      That is, the summary statistics are incomplete for the kind of inference you want to draw.

      In particular, the summary statistics you give tell us that having the genetic marker makes a smoker twice as likely to experience psychosis as a smoker who does not have the marker. It does not tell us how much more or less likely psychosis is compared to a non-smoker.

      Critical thinking failure.

      --
      After all, I am strangely colored.
    7. Re:do tell by lgw · · Score: 2

      These are zip guns. The plastic printed one is obviously dangerous and unreliable even by the standard of zip guns (which usually start with a pipe from a hardware store and go downhill from there). This is a "look at what's possible" statement, and nothing more, especially in America where you can make a perfectly serviceable AR15 from some kit parts and a CnC mill, and legally so in most places.

      Heck, you can make a working AK47 for a shovel without advanced tools, if you're skilled.

      The technology will only improve. The plastic gun is just "here's a new way to do this thing we can do in other ways - so far it's useless, but this way is very likely to improve".

      --
      Socialism: a lie told by totalitarians and believed by fools.
    8. Re:do tell by Jane+Q.+Public · · Score: 2

      A friend of mine has this to say about "gateway drugs":

      So what if 20% of marijuana users go on to use "hard" drugs? They ALL started on milk!

      Correlation does not equal causation.

    9. Re:do tell by krotkruton · · Score: 2

      Especially if you want them to explode. I'm not saying they did or didn't perform tests using sub-par equipment or design the guns specifically to explode after a certain number of rounds are fired, but they sure didn't provide enough information about their testing procedure to reproduce the results or confirm they were valid tests.

      I don't know a whole lot about guns, but I'm pretty sure that if someone wanted to build a conventional gun that would reliably explode after the first shot, they could do it pretty easily, so I've got to assume that the ATF can build a 3D gun that would reliably explode as well.

    10. Re:do tell by jklovanc · · Score: 2

      No because there are very few people currently working for the government that were working when those films and campaigns were created. The "government" is not a monolithic consistent sentient entity. It is made of the people elected to control it and hired to work for it therefore it constantly changes. The current government is not the "same" as one 30 years ago.

    11. Re:do tell by AJWM · · Score: 2

      Well, it's true that if you smoke Mary Jane you will eventually die. Absolutely certain.

      Don't be so sure. A statistically significant fraction of the people who were ever born haven't died.

      Although I suppose "eventually" could extend to the heat death of the universe.

      --
      -- Alastair
    12. Re:do tell by Anonymous Coward · · Score: 2, Insightful

      And oddly enough I get the sense that the purpose to which YOU put your abilities for critical thinking is to ensure a lack of supply of marijuana rather than determining its actual risk.

    13. Re:do tell by SomePoorSchmuck · · Score: 2

      No because there are very few people currently working for the government that were working when those films and campaigns were created. The "government" is not a monolithic consistent sentient entity. It is made of the people elected to control it and hired to work for it therefore it constantly changes. The current government is not the "same" as one 30 years ago.

      Which of course is beside the point. Millions of Millions of cells in your body now are not the same cells as three months ago. Yet "you" as a system persist. The genius of the political philosophers and statesmen of the 1700s and early 1800s was that they recognized government is a system which has certain inherent tendencies that lead to bad ends, and therefore we must build in limits to those tendencies. 200 years later this country is populated and run by their naive Eloi descendents, whose political philosophy no longer recognizes that Government is a system, and your policies should focus on the systemic effects first. Just because the individual workers in the belly of Leviathan change periodically doesn't mean we should ignore the Emergent Properties of governmental systems. Hitler made history, but History also made Hitler. Create a government and give it power, and individuals will arise to exercise that power. But modern people have a far less sophisticated political philosophy in which the government is perceived as little more than the lever in a Skinner box, and so all we do is vote for the outcomes we want to occur when we press that lever. There is no regard for what disastrous systemic tendencies we are enabling by insisting that government provide these outcomes.

      Our collective intelligence vector now stands around saying, "But it's got what plants crave! It's got electrolytes!"

      --

      Hollywood, Television, has become the dream machine. We need to take that back; each of us is a Dream Machine
  2. Coming soon - 3D printable everything by Press2ToContinue · · Score: 4, Funny

    Once they have these minor inconveniences ironed out I look forward to printing my own hand grenades, flame-throwers, rocket-launchers, heat-seeking missiles, and battalion of robo-troops to deploy them on my 3D-printed floating island in the pacific.

    Dammit - printer jam. brb

    --
    Sent from my ENIAC
    1. Re:Coming soon - 3D printable everything by freeze128 · · Score: 2

      Molotov Cocktails are cheaper, more easily available, and faster to produce.

    2. Re:Coming soon - 3D printable everything by fuzzyfuzzyfungus · · Score: 2

      Sure, 3d printing will revolutionize explosives. But it's also going to revolutionize reactive armor.

      So you're saying that it'll help expand two product lines? Score!

      -General Dynamics

  3. Lowest Bidder? by Liquidretro · · Score: 2

    So the same contractor who built the health care website builds 3D printers now? Joking aside this would not be a very good test if the agency regulating guns came out and said the ones you make yourself without regulation work better than the ones we regulate, now would it.

  4. Fearmongering at its finest. by intermodal · · Score: 2

    The plastic gun sale ban is the motivation here. The ATF doesn't care how many people get hurt by bad, homemade guns. The ATF cares about making their own jobs easier by keeping the plastic gun ban in place.

    That said, I think most plastic guns are a horrible idea. But, that's why I don't buy nor use them. I have no problem with others doing so while safely away from me.

    --
    In SOVIET RUSSIA... erm...NSA AMERICA, the Internet logs onto YOU!
  5. of course their demo exploded by Gothmolly · · Score: 4, Insightful

    So they can show that 3d printed guns are bad and should be outlawed.

    WTF, how is this even news?

    --
    I want to delete my account but Slashdot doesn't allow it.
  6. So no new laws then by SuperKendall · · Score: 4, Funny

    It looks then like we don't need to pass any laws around 3D printing of guns, since according to the feds it's a self-correcting problem.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
  7. Entirely Appropriate by hedgemage · · Score: 3, Interesting

    I think its entirely appropriate for government to determine safety standards and inform the citizenry when something doesn't comply. With the manufacturing of /everything/ by 3D printers, the vast majority of the populace has no way to determine which designs are safe and stable and which are junk because most of them are not engineers or materials scientists. I think that testing and rating designs for potentially dangerous items, not just firearms, that could cause grievous harm due to catastrophic failure is good role for government to act in the common good.

    Keep the designs free for all, but provide a central database where I can reference a rating performed by experts. I wouldn't mind my tax dollars going for that.

  8. 3d printers, A tool with bad press by GoodNewsJimDotCom · · Score: 3, Interesting

    I can think of many tools that if used wrong can kill.

    3d printers just get bad press because manufacturing is afraid of losing out on money.

    Anything that is new will get bad press if people will lose money.

    Examples: MPAA/RIAA hated the Internet for sharing songs. So they sued grandmothers for millions and won.
    Cable companies are afraid they'll give you too much bandwith and never pay for TV again. So they restrict usages like jerks.
    Newspaper is worried that free online newspaper will put them out of buisness. So Murdoc makes threatening claims.
    Petroleum giants are afraid of the electric car, so anything something slightly goes wrong with a Tesla, it makes press.
    Energy Utilities are afraid of solar, so solar gets all sorts of negative press that it will never fly or be a solution.
    It just goes on and on. People with money are afraid of losing their cash cows, so instead of doing what's good for society, they do whats best for themselves. And part of the equation today is,"You can only get away with so much in USA politics. If you can't make a bull shit propoganda story why something is bad for society, people won't elect the crook next cycle." And really, that is about the only thing that keeps the USA from going from suck to blow. So any time someone paints a bullshit propoganda story to you, be a good citizen and dismantle it.

  9. Not often by Sycraft-fu · · Score: 5, Insightful

    If you have a properly made gun, it takes a pretty bad malfunction to explode, and then usually they don't actually explode in any normal sense of the word, they just distend and crack. Guns are made to be reliable, since the agencies that buy them tend to value that.

  10. Well...remeber the name... by TheCarp · · Score: 2

    "Liberator"..... as some friends of mine pointed out, takes the name of a gun that was dropped in Nazi occupied germany; and essentially encouraged people to use it...once... to shoot a nazi and aquire a real gun. :)

    I think the idea is just that, this obviates the need for manufacturing outside and air dropping in, if any geek with a modest personal investment can make them by the 10s or 100s.

    --
    "I opened my eyes, and everything went dark again"
  11. Re:Lets flood the web with faulty designs.... by JamieIanMacgregor · · Score: 2

    the middle east is already flooded with c4 filled rifle ammunition which will destroy the rifle and likely the person holding it too. if you're over there be very careful what ammunition you're using, especially in your little plastic liberator.

  12. Re:This kills the "heritage" argument for me by drinkypoo · · Score: 2

    This is an ugly piece of plastic made by people just to give the proverbial middle finger to the government.

    The fact that an ugly piece of plastic does give the middle finger to the government is what makes it an important political statement.

    --
    "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  13. Re:BATFE by felrom · · Score: 2

    It was in their shotgun import study they did maybe 3 years ago. They were arguing that they should ban a whole bunch of models of shotguns from import because 3-gun (a sport with over 250,000 competitors, nationally sponsored "pros", and its own TV channel) and plinking were not sports by the ATF's headache inducing butchering of the English language. During said mental gymnastics, they made the claim that plinking was instead a "past-time, and not a sport." I'm sure Major League Baseball, as America's National Past-Time, would be saddened to hear that the ATF thinks it is not a sport.

    ; )

  14. No this is not that at all by Sycraft-fu · · Score: 2

    When I say "properly made gun" I mean "Basically every commercial firearm made today." I am certainly not going to claim that no gun could ever have problems, particularly something knocked together by amateurs in their basement (like printed guns) but it turns out that the kind of guns you go and buy in a gun store and pretty damn reliable. That is what is in demand, not just with private shooters but more importantly with police agencies and governments, who like to buy a lot of guns.

    There are plenty of regulations and tests in that regard. They see what happens if you jam a round in the barrel, then fire another in to it, They are required to fire a proof load (a deliberately overpressure load) without any problems, and so on. If you are interested, go check out the SAAMI standards (they do cost some money).

    I don't think you appreciate what goes in to building a gun. They are made to be pretty robust. The barrels are made of thick, strong steel, often hammer forged (not meaning with a blacksmith's hammer, but a massive pneumatic device) and can take some real abuse.