3D Printing

First 3D-Printed Metal Gun! That Addresses Politicians' Detectability Worries, Right?

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Solid Concepts gun
Solid Concepts

Just months after the first 3D-printed gun appeared in un-lovely but very workable plastic, Solid Concepts, an engineering firm that specialized in rapid prototyping and custom manufacturing, says it 3D-printed a gun in 17-4 Stainless Steel and Inconel 625 (a nickel-chromium alloy). Politicians have fretted since Cody Wilson and Defense Distributed unveiled the first 3D-printed gun that plastic pistols raised concerns about DIY undetectable firearms. Do you think the Solid Concepts announcement will allay their concerns and set them to worrying over something else? Hmmm…

On the company blog, Solid Concepts' Alyssa Parkinson notes:

Solid Concepts is a world leader of 3D Printing services, and our ability to 3D Print the world's first metal gun solidifies our standing. The gun is a classic 1911, a model that is at once timeless and public domain. It functions beautifully: Our resident gun expert has fired 50 successful rounds and hit a few bull's eyes at over 30 yards. The gun is composed of 30+ 3D Printed components with 17-4 Stainless Steel and Inconel 625 materials. We completed it with a Selective Laser Sintered (SLS) 3D Printed hand grip, because we're kind of crazy about 3D Printing.

I like the combination of old-school 1911 (a model of gun I enjoy shooting) and new technology, although the century-plus old design also enabled the company to fashion something that went bang in a time-proven way without treading on anybody's intellectual property rights. Interestingly, the barrel rifling was printed right into the gun, not machined. In fact, no machining was used, although there was some hand finishing on the final product.

For Solid Concepts, a California-based firm with offices in Arizona, Texas, and Michigan, (the gun was printed in Texas) the 3D-printed gun, more than anything else, was an attention-grabbing way of demonstrating the company's ability to use new technology to construct tough and durable products. As Parkinson points out, this feat isn't likely to be replicated in the home workshop anytime soon. "The industrial printer we used costs more than my college tuition (and I went to a private university) and the engineers who run our machines are top of the line; they are experts who know what they're doing and understand 3D Printing better than anyone in this business."

But new technology has a way of coming down in price as it matures and spreads—a phenomenon that can only be encouraged when laser-sintering patents expire in a few months. That won't necessarily put laser-sintering printers within range of your budget in the short term, but it's certainly a step in that direction.

Somehow, I don't see Sen. Charles Schumer, Rep. Steve Israel, and the other politicians who have been publicly rending their garments over plastic guns being entirely satisfied by this development.

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  1. What about a 2D-printed gun made of paper parts that your folded into three dimensions?

    1. Assault origami?

      1. All of sudden, buying 100 sheets of printer paper gets you red-flagged by the ATF.

        1. We realize now that they don’t make any printer trays which only accept 7 pieces of paper, so you can keep using the ones you have, just don’t put more than 7 sheets in at once.

          1. LOL’d — I call threadwinner for AD.

      2. We need sensible controls on origami paper!

        1. 99% of Americans agree with common sense measures proposed by The President to limit paper sales and use.

    2. One form of rapid prototyping is LOM, Laminated Object Manufacturing, in which you feed in sheet paper (or plastic, or metal); from each piece, one slice of the model is cut, before then being adhered to the next sheet, and so on, until you’ve produced your part.

      1. Why, back in my day, we did rapid prototyping that took DAYS to print really basic shapes. It was a all automated and computer generated, but it was primitive in comparison to this.

        And that was good enough and we LIKED it! You kids with your fancy guns and 1/4 scale Miller indy cars…GET OFF MY LAWN!

      2. Vietnamese jungle armories built full functional Thompson submachineguns in this way. Imagine a gun built out of thin strips of metal, the way a Master padlock.is made.

    3. Won’t that get you arrested in just about any government school in the land?

  2. Excellent.

  3. Let me know when they can print a phased plasma rifle in the 40 Watt range.

    1. Just what’s on the shelves, pal!

      1. Hey…you can’t do that…

    2. Next you’ll want us to 3D print Earl grey, hot.

      1. Cell phone communicators, iPads, and now replicators. Hell, the internet is basically a holodeck where you can enjoy all kinds of depraved fantasies, al a Reginald Barclay.

          1. But do I still have to type one handed?

      2. whoa

        *mind blown*

      3. And then I’ll go ask my intergalactic janitor for advice. About Barclay.

        1. Uncle Martin wasn’t a janitor. He was a groundskeeper — mostly a gardener. He and his friend Chauncey used to spend hours discussing the good old days and the good old days to come, playing checkers in the arboretum as Starfleet Academy.

          1. I thought he’d be playing with Jeff Spicoli.

  4. I don’t think I would want to put too many rounds through that, though. Has it been pressure tested? Seems like a good way to get a kaboom to the face…

    1. 3D-printed a gun in 17-4 Stainless Steel and Inconel 625 .

      Wha? I’d make a steam boiler out of that stuff.

      1. Sure, if it was traditionally forged metal. Does laser sintered metal have the same properties? I would think not, but this is not something I know a whole lot about.

        1. As near as I can tell, laser sintering is welding together a whole lot of little metal shavings. With even a commercial machine, you should have one piece of metal from a functional standpoint, same as the finest artesian welders. As long as your metal bits are well-mixed and uniform, its all good.

          Also, most of those parts traditionally are going to be stamped from a poured and rolled blank, not forged. Barrels will be lathed, drilled, and rifled from a similarly formed stock. So usually there is no post-pour hardening process I am aware of for guns. Or really any steel except custom knives, which are usually NOT uniform throughout.

          1. You’re the engineer, so I’ll take your word for it. You first, though.

          2. We heat treat forged gears for car axles after machining the gear pattern into them, if that’s what you’re referring to.

            The blanks are forged, then we machine them and then heat treat them and oil quench for hardness without brittleness.

            Manufacturing is fucking cool….:)

            1. Noooow – could they print a gearset that wouldn’t require lapping to “bed in” and would run quiet and not break under load from 800 ft lbs of torque in an axle like our frightfully-complex-to-machine-and-build gears? Hmmmmm….interesting.

            2. Okay, that’s bitchin. You guys beat out blanks? Is that so you can have different metals across the profile?

              1. We buy the blanks – we do the machining and heat treating and assemble them into front and rear axles. It’s fucking primitive compared to making engines (which is what we did at the other plants I was at), but it’s really cool. It’s all steel and fire and giants presses and milling and cutting and welding and shit.

                The only thing cooler was the iron foundry that I had – closed it down. But got to watch engine blocks get cast for a couple years – it’s just as scary and awesome as it looks on TV. Fucking MOLTEN IRON and sparks everywhere – just so fucking primal. Really cool shit.

                1. I shoulda been an ME. 🙁

                  Usually in Chemical Engineering fields, if you’re seeing sparks and liquid fire, its a bad day.

                  1. You should go into fireworks my friend!

                    1. I like staying alive, not working with tons of explosives that need to be handled by the cheapest labor I can find.

            3. When I was working at Dana-Spicer transmissions, I thought we sent our gears out for vacuum quenching. But I just worked in Accounting, not on the plant floor.

          3. Things like bolts (in the gun sense) and trunnions are typically hardened to stand up to the beating of firearms applications. For instance, the bolt.of an UZI submachine gun is hardened to an insane degree. In fact, there were some aftermarket.bolts made.in.the US that never worked right because they warped when hardened and were not properly ground back into shape.

            AR, AK, FN-FAL, FN-FNC, FN-SCAR, etc rifles all need hardened bolts to function for more than a few shots without dangerourls headspace problems. M1 and M1A are probably similar.

            1. Wow. I surrender. I thought they were all stamped now.

              1. Also, just remembered that there were problems with some Chinese Polytech M14s that were due to not heat treating the receivers, which stretched enough to get.to a dangerous headspace setting and then…Kaboom.

          4. Uh … I think you can have an Artesian well, or an artisan welder, but I have never heard of an Artesian welder — or is sintering something they are famous for in that area of France and I just didn’t get the memo?

            1. Fuck my goddman splel check.

          5. I work as a mechanical engineer in the aviation industry, where I repair gas-turbine engines. I have direct experience in developing repairs using laser-cladding technology, which is basically a form of laser sintering that builds up worn areas of geometry. Essentially we will identify and measure a worn area of an engine part, then develop a program to apply cladding to the worn area. The cladded part will then be heat treated and machined to the original geometry. The technology works by basically injecting powdered metal into the path of a laser using the purging gas. The powder and parent metal melt together to build up material on a surface. It is considered a form of welding and falls under the AWS D17.1 weld spec.

            1. When using additive material processes (including sintering, cladding, thermal spraying, welding, etc.) the key properties are material density, hardness, and the size of the heat affected zone. The sintering/cladding process has evolved to produce material densities in the 98% range, which is equivalent to forged metal and allows for excelled durability. The process also creates a small heat affected zone, which limits fatigue cracking and increases longevity. The material tends to be very brittle immediately after processing, however, so heat treating is essential. The material needs to be solution heat treated to normalize the material properties, then heat treated to the proper hardness required by the function of the part. Different parts of a firearm are heat treated in different ways. Trigger components tend to be case hardened to prevent wear. Barrels are aged to increase strength and reduce the change of failure. Bolt faces are hardened to withstand impact forces.

            2. It is possible that sintering will produce a firearm that exceeds the quality to a forged and machined. Forging adds strength to a part because the granular structures of the metal have been formed into the rough shape of the part. I would imagine that sintering produces a similar affect, but I have not read any studies on this subject. Also, the differences in machining will play a role as well. Machining tends to work harden a part and introduce micro-cracking in a material, which can decrease the fatigue-life of a part. Since sintered parts do not have to be machined (just polished or ground to size), this should cause the parts to last longer then forged and machined parts.

          6. With sintering I’d expect porosity.

            1. (Ignore that, I hadn’t read enough of the comments.)

          7. Just sintering on its own isn’t going to give you ideal material properties. Residual stress should be relatively low but density and resulting tensile strength tend to abe a bit on the low side as well. You really need an additional source of pressure and that’s not how these tools operate. You can get some interesting parts from a laser sintering 3D printer, but it’s not going to replace conventional methods for either volume or strength.

            The metal in a gun produced the conventional way will have some work hardening even if there is no additional processing.

            http://www.lasc.us/RangingShot…..eature.htm

            The heat treatment and other production processes involved in making the steel bar leave residual stresses, which can result in the bar bending as steel is removed in making the barrel. The stress can be relieved by putting the steel in an oven and taking it up to 600 C, then allowing it to cool very slowly over the next twelve hours or so. Barrel steel is usually double stress relieved to make absolutely sure it stays straight through the various machining processes.

            1. The really cool things that can be done with SLS haven’t even been realized at this point. Why stick with just a single metal or alloy? SLS already gives you the ability to control grain structure on the microscale. By borrowing techniques from super-resolution imaging techniques, it can probably control grain structure on the nanoscale. Think about that – totally custom alloys engineered from the nanoscale up.

        2. That’s why the first couple shots were done remotely with a string attached to the trigger.

          The fact that after that they were willing to fire it in their hand for 50 rounds would indicate:

          1) They are insanely crazy about risk taking.

          2) They have done their due diligence on testing and cautiously decided it was entirely safe to fire it repeatedly.

          I’m guessing option 2.

          1. Yeah, these are engineers. Their risk management is probably ingrained at the cellular level.

            1. I resemble that remark.

        3. Sintered metal is usually stronger than single crystals.

  5. That’s gorgeous. God bless John Browning.

    Can they mix me up a Ford SOHC 427 drag motor, too? Wonder what that would cost?

    The possibilities are endless! Love it!

    1. Or lower control arms with integrated ball joints.

      1. “Print me a Rolls Royce. Can you have that by Thursday?”

        1. First they’ll print Kias because everything is plastic or metal. It’ll be a while before they can print varnished walnut and calfskin.

          1. I can afford to wait….

            *sits back in overstuffed chair and retrieves freshly-polished monocle from Russian teen slave servant slave*

            1. Ah, I see you know my friend who opened the “Home for Wayward Girls from Former Soviet Republics”

              1. Girls…..?

                1. It might be his cousin.

      2. Or lower control arms with integrated ball joints.

        I’d finally be able to reach the top shelf…

        …behind me!

    2. Not 3D printed, but if cast will do, Dove’s got your number: Cammer kits.

      1. I’ll be in my bunk

  6. I’ve been thinking about this. If these 3-D printers are “printing” guns, then this is really about the freedom of the press, where the “press” refers to the printing press. It’s a natural, living interpretation and expansion of the First Amendment. Therefore, printed guns are protected by both the First and Second Amendments.

    1. Nice try, ProL, but they didn’t have semi-automatic printing presses back then – fully automatic on the black market.

      So…something something Matty Yglesias Ezra Klein derptastic whatever nuh uh nope.

      1. No, no, it’s a living, breathing document. It must change with the times. What are you, pro-slavery?

        1. SHUT UP I WIN NAH NAH NAH NAH NAAAAAAH

            1. Says the dead old white male

              1. You’ve managed to kill everyone else, but like a poor marksman, you keep missing the target!

                1. We are not so different, you and I….

              2. Pro Lib is a many things (old, white, and male all among them), but he’s not dead. I’m actually pretty sure he’s immortal.

                1. I dunno, but I do own a sword.

    2. Only if you’re printing those guns in ink, and by a printing press ran via human power.

      1. So we can close down NYT And Fox News when we take over? Bitchin.

    3. Well, the second amendment only applies to muskets, so the first must only apply to screw operated printing presses.

      1. That, and town criers. Yelling a bullet into a target, therefore, is covered by the 1st and 2nd Amendments.

      2. And there’s nothing in the Constitution authorizing the Govt to use electricity or horseless carriages.

  7. I’m really amazed that they didn’t have to do any machining on the parts. I want to see the machine that prints that.

    1. That gun? You didn’t print that.

    2. It looks like they did a final “polishing” by firing. But the tolerances were good enough to fire anyhow.

      1. That is frickin amazing. I’m interested to see:

        1) how this runs after a couple thousand rounds (reliability) and
        2) when we see the first mix -n- match plastic/metal Glock knockoff printed gun. And will that function like a real Glock, that works pretty much no matter what you do to it (in my experience).

        1. Do you hide your Glock in the bottom of your fish tank too?

          1. Ix-nay on evealing-ray the ecrets-say….

  8. Printed rifling is great. Rifling is one of the most specialized operations in firearms manufacture. Even if every other part were made on traditional machinery, the capability to make rifled barrels on a 3D printer will be a game changer eventually.

    The major issue the Polish resistance had in arming itself was rifled barrels. They could.make every other part of a submachinegun in small home shops but they were forced to rely on airdrops and.other sources of smuggled barrels.

    In addition, variable-pitch rifling will now be a real.and economical (eventually) possibility. This will do very good things for accuracy and longevity.of rifled barrels.

    1. it may require thicker barrels to withstand the pressure though

  9. YOU’LL PUT YOUR EYE OUT!

  10. So this means that I should be able to buy a nice 1911 for like $100 pretty soon, right?

    1. Not if Kimber has anything to say about it.

      1. He said nice. What does Kimber know about that?

  11. Wilson Combat are gonna be PISSED

    1. Screw them and their $3000 .45s!

  12. Somehow, I don’t Sen. Charles Schumer, Rep. Steve Israel, and the other politicians who have been publicly rending their garments over plastic guns being enturely satisfied by this development.

    Since this is all legal and above board, including an appropriate firearm manufacturer’s license, Chuck Schumer’s input don’t mean shit.

    I’d be very interested in seeing their price list.

    1. When does law or logic ever stop Chuck Schumer from screaming his spew? Onward comrades, we must disarm all peasants and armed our brothers and sisters.

  13. So this means that I should be able to buy a nice 1911 for like $100 pretty soon, right?

    At the hardware store, just like in 1965.

    1. lulz – Sears and Roebuck shotguns for $65 in the Christmas catalog! Yay!

    2. You probably want black people to have to drink out of separate fountains too!

      1. No, but are the fountains 3D printed?

  14. I wonder if a particular individual firearm could be duplicated on a 3D printer so closely that it would leave identical toolmarks on casings and bullets to its “original.”

    That could set up some really scary possibilities for framing people for murder.

    1. Huh – I was thinking about the collector’s market – db goes RIGHT to the murdering. Typical.

      1. Such violence. I was wondering if you could SLS ceramics, because 3d printed bongs would be pretty awesome.

        1. puff, puff, PASS OUT, amirite?

        2. I would like 3d printed ceramics so I could make a ceramic cast for bronze swords..

          Why not just 3d print the swords?

          cuz fuck the police that is why!!!

        3. Yes, you can get printed ceramic bongs from Shapeways.

        4. If you’re looking into 3D printed bongs, is glass okay? Because there is a guy out there who does 3D printing of glass. He uses highly focused light from the sun to selectively sinter sand into glass. Pretty cool.

    2. I think the other way. Once you can print barrels and firing pins, ballistics are worthless. But I don’t think you can load bullets to close enough specs, nor get the exact same lubrication patterns, etc to make two barrels and firing pins to leave matching ballistic patterns.

    3. I think what it would set up would be a field day for defense attorneys in casting reasonable doubt.

      1. Pish. Your uptodate attorneys won’t be casting reasonable doubt, they’ll be printing it, amirite?

        1. I’m more worried about forged evidence.

          1. they’ll be out of bidness, too

          2. Right, right, move along! Too silly!

      2. Don’t you mean “printing” reasonable doubt?

        1. Dang nevermind…

  15. How long before I can print fresh orphans to replace the ones that fall into the machinery?

    1. Thanks for asking the logical question we’re all missing!

  16. Can they mix me up a Ford SOHC 427 drag motor

    Bah! I’ll have a Cosworth DFV.

    1. I’ll take a Lycoming IO-540 when they get around to it. Should make a nice fast homebuilt aircraft a little cheaper.

    2. That’d be real nice. I’ll take an old Offy in a front-engined sprint car…

      /old person

  17. Why don’t they have a video of the printer making the gun?

    I am not making a conspiracy here…only saying if the gun firing is is good promotional material perhaps seeing the printers in action making the gun would be good promotional material as well.

    1. …when it fired, the gun went BACK and to the LEFT….BACK and to the LEFT…

  18. As near as I can tell, laser sintering is welding together a whole lot of little metal shavings. With even a commercial machine, you should have one piece of metal from a functional standpoint, same as the finest artesian welders. As long as your metal bits are well-mixed and uniform, its all good.

    My prior understanding of sintered metal manufacturing was “powdered” metal formed using heat and pressure, but I guess if this is basically laser welded into a whole, grain by grain, pressure is not necessary. Cool.

    1. [long shot of black box with a few attachments and a blinking light.]

      [man reaches into black box and takes out gun.]

      You mean, like that?

    2. You’re thinking old school powder metallurgy. Press the powder into green shape and fire it in a furnace, right?

      SLS works with a very thin layer of metal powder heated to a stupid level with a laser so it fuzes. Lay down another layer and repeat. After a shit ton of layers, you have a metal part.

      Z Corp used to do a similar thing with some starch based powder and an inkjet head.

      1. So, basically laser welding layer after layer? I’d think that would be…..a pretty solid paln, dude!

        http://www.anonometalprinting.de/guns_r_us

    3. Ah ha! They do essentially that, but they do have post-printing hardening and polishing in the traditional way as required. At least, according to their 90 second video.

  19. Also, I wonder if they used stainless and inconel because they are particularly suited to being formed this way. it seems unlikely that was just “what we had in the bin”.

    1. Possibly. Inco 625 is typically used for forgings and things that need toughness over hardness. As I recall, it has a lower yield strength but is resistant to high cycle fatigue. Don’t know about their 17-4 stainless. I wouldn’t be surprised if the barrel.were made of 625 for this reason.

      IIRC 625 is not heat treatable. I have a whole book.on Inco alloys but not here.in.my.office.

  20. Looking at some photos the other day, it certainly appears they did some cosmetic polishing on the slide and other parts. I wondered if they polished the bore, or how much “fettling” was required to fit the parts.

  21. I don’t know what they are using now, but in the old turbocharged indy cars, inconel exhausts were The Shit. Strength, resistance to ridiculous heat and vibration, very light weight.

    1. F1 uses hand-made titanium exhausts now. Good for one race only.

  22. On a related topic, I finished my 16-hour IL concealed carry course last week. Although kind of long, I got re-drilled on a lot of gun safety and on the use of lethal force, which was useful and interesting. I also learned that I love my Glock 23, which I have named Mr. Blasty.

    Now all I want to do is read about guns all day. Does anybody here have an M1A?

    1. Does anybody here have an M1A?

      You betcha. 18″ barrel, aftermarket stock, and Trijicon scoped.

      It has its own stash of .308 ammo, too.

      1. You’ve got to be careful with that, Mr. Dean. These guns are known to rampage around without their owner’s consent. Although you’re not, to my knowledge, a sworn LEO.

      2. Nice. I’ve been doing some reading on M1As vs. AR-15s. It’s kind of apples and oranges, I know, but I get the impression that if you’re going to get one or the other, the M1A is the way to go by a mile.

  23. I’ll leave this here;
    http://www.northeastshooters.c…..mi-warning!

    1. Boris, the genius behind that masterpiece, also built a Glock from scratch.

    2. I read that before and it is still awesome. Also, I just noticed that guy has the same table saw as I do.

  24. Somehow, I don’t see Sen. Charles Schumer, Rep. Steve Israel, and the other politicians who have been publicly rending their garments over plastic guns being entirely satisfied by this development.

    Holy shit, you call out two very prominent Jooish politicians by name in a “rending their garments” comment and nobody else on here catches it? Well done, Tuccille.

    Oh, and you know who else had Jews rending their garments?

    1. The King of Ai…for a little while at least.

    2. That shegetz their daughter has been hanging around with?

  25. We have a Tony sighting over at Salon:

    Tony 5 minutes ago
    The right fundamentally does not understand the concept of shared risk–forget about shared responsibility. Of course they continue in this confusion while enjoying the fruits of a civilization built by other people.

    As I responded to him, I guess private enterprise and businesses truly know nothing about the concept of risk.

    1. We have a Tony sighting over at Salon:

      Next time, leave him there!

    2. Why do you engage that dumbass?

      Also, Clippers game tonight has some cheap tix. I may try to con Banjos into going if you or anyone else is up for it. No traffic because of Veterans Day makes it a lot more appealing.

      1. Thanks for the offer, but it’s my sister’s birthday so I’ll be out at a family dinner tonight.

    3. they continue in this confusion while enjoying the fruits of a civilization built by other people.

      As we all know after 4000 years innovations such as the discovery of fire and domestication of wheat automatically cede ownership to statist governments.

  26. Showing up late, but I have a huge boner. I am thinking that at some time in the foreseeable future I will be able to print all the guns I want and dont have. I will start making my list, starting with the S+W model 41, model 27, another model 29….oh, the possibilities! And winchester 94’s in any caliber I want!

    1. Yep, the more I think about it….
      A winchester 94 16″ barrel in 41 mag and one in 50 S+W, another in 460…..

      Yeah, I will be in my bunk.

      1. Jesus. Do you hate your shoulder?

        1. HaHa.

          I am 5’10” and 150 lbs and I have an FN in 458 winchester that I can shoot all day with no problems.

          It is all in how you hold it.

    2. Um, I have this friend who wants to know when a metal printer is capable of printing a barrel that can withstand firing 7.92mm Mauser rounds at a rate of approximately 1200rpm. Not that he wants to build anything like that, of course.

  27. I hope that everyone sees how silly the idea of Gun Registration is given the fact that anyone can easily make a gun whether 3-d or with a long metal pipe and explosives/rocks.

    The entire registration process and verifying if the person is not crazy, not a criminal, or is a christian is completely USELESS !!!

    1. Have you gone and fucked yourself lately? Maybe you should go do that now.

      1. Alice has a point. Gun registration only solves the problem of law abiding citizens with guns, which is totally not the intended effect…

    2. – “Anything else?”

      – “Phased Crazy Rifle, in the Alice Bowie range.”

    3. Off to the reeducation camps with you Alice!

    4. What the HELL???

      I thought my libertarian friends want LESS GOVERNMENT in our lives and LESS laws.

      Just get rid of these silly registration laws. They are meaningless in a world where I can get an unregistered gun or make one of my own.

      It is like outlawing masturbation.

      1. It is like outlawing masturbation.

        Careful, or you will shoot your eye out.

      2. Registration is unconstitutional and I take no part in it. That’s Tulpa’s hobby, registering guns and doing paperwork, apparently.

    5. “The entire registration process and verifying if the person is not crazy, not a criminal, or is a christian is completely USELESS !!!”

      True, that shit.

  28. “I don’t think I would want to put too many rounds through that, though. Has it been pressure tested? Seems like a good way to get a kaboom to the face…”

    Stainless steel is one of the finest materials. Its use was perfected decades ago by a company called Budd. They developed and patented the technique called shotwelding, which creates bonds the circumference of a pea that are actually stronger than the surrounding metal. A whole solid piece of material welded together ought to be sufficiently strong or stronger compared to traditionally machined metal.

  29. Some captains of sunset industry must have creamed when it occurred to them that they could whisper to certain senators, “If it can make a weapon it is a weapon. So don’t wait for the streets to run ankle-deep with the blood of The Children: at the very least, require people to get a license to make X if they want to own a machine that can make X. Better yet, outlaw such machines entirely. There’s no such thing as a reasonable risk to The Children.”

  30. No Hat Tip, 2Chill?

    Entropy Void|11.8.13 @ 4:40PM|#|?|filternamelinkcustom

    I’ll just put this here:

    3D Printed .45 from powdered metal …

    http://www.theregister.co.uk/2…..quivalent/
    reply to this

    Entropy Void|11.8.13 @ 4:44PM|#|?|filternamelinkcustom

    And this can go here:

    http://mentalfloss.com/article…..tro-pizzas
    reply to this

    PapayaSF|11.8.13 @ 5:02PM|#|?|filternamelinkcustom

    There are already fresh pizza vending machines.
    reply to this

    BakedPenguin|11.8.13 @ 5:08PM|#|?|filternamelinkcustom

    Jesus. We’ll have Star Trek replicators in less than a decade.
    reply to this

    Brandon|11.8.13 @ 4:45PM|#|?|filternamelinkcustom

    So, do the gun grabbers give up and go home, or do they double down? I know what my money’s on.
    reply to this

    Corning|11.8.13 @ 4:49PM|#|?|filternamelinkcustom

    In the video the gun seemed to “stick”.

    Did they oil the thing properly?

    Is it just tight because it is new?

    Am i just seeing things?
    reply to this

    Zakalwe|11.8.13 @ 4:52PM|#|?|filternamelinkcustom

    Some tech site said the same thing, but that it got smoother as time went on. He thought sintering would cause a more porous and a “rough” microscale construction that got smoothed out as it fired.

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