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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 12-09-2012, 11:16 AM
Chaozu Chaozu is offline
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Default 3D printed AR-15 Fail

Not sure if this is a dupe or not, but thought you guys might like this.

http://www.youtube.com/watch?feature...&v=wuDCW_Rn5JI
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  #2  
Old 12-09-2012, 11:38 AM
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Yes, it's a dupe.
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  #3  
Old 12-09-2012, 12:24 PM
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3D printers are pretty cool, I have a crown in my mouth that was made on a 3D printer while I waited at the dentists office. I broke a tooth and was able to go in to the dentist and walk out the same day with a new tooth!

Now as for 3D printers used to make receivers I don't think there's strong enough material yet, but some day in the not too distant future it will create a fascinating 80% build landscape.
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Old 12-09-2012, 3:18 PM
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That's hardly a fail. That's like saying the Wright brothers failed with their plane because it didn't fly very high or very long. Considering what this was, it did well.
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  #5  
Old 12-09-2012, 3:56 PM
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Originally Posted by jcwatchdog View Post
That's hardly a fail. That's like saying the Wright brothers failed with their plane because it didn't fly very high or very long. Considering what this was, it did well.
Agree.

I see it as more of a success than a failure.
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Old 12-09-2012, 3:59 PM
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Thanks for the post. I wasn't at all familiar with 3d printers. That video led to more on YouTube. Fascinating.




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  #7  
Old 12-09-2012, 4:49 PM
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They will get it right soon enough...
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  #8  
Old 12-09-2012, 5:05 PM
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They will get it right soon enough...
maybe they need to make a design that uses simple things as reenforcements like nails

i wonder how it would have done with a 22lr conversion
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Old 12-09-2012, 5:32 PM
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Quote:
Originally Posted by Moonshine View Post
3D printers are pretty cool, I have a crown in my mouth that was made on a 3D printer while I waited at the dentists office. I broke a tooth and was able to go in to the dentist and walk out the same day with a new tooth!

Now as for 3D printers used to make receivers I don't think there's strong enough material yet, but some day in the not too distant future it will create a fascinating 80% build landscape.
actually you do not have a 3D printed crown. your crown was milled out of a block of porcelain


too bad this one failed....soon enough this method may be a viable process to make a lower.
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Old 12-09-2012, 5:33 PM
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Like I said before 3d printers have the potential to make the 80% scene VERY interesting. Just imagine building your own Glock for starters and with RRA introducing their polymer 1911 it shows you can indeed make guns traditionally made out of steel frames from polymer frames as well.
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  #11  
Old 12-09-2012, 6:31 PM
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I think this guy is on to something.
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Old 12-09-2012, 6:44 PM
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He used a very CHEAP 3D printer and a cheap material to make that receiver. The cheap 3D printers use ABS plastic, not unlike lawn sprinkler fittings. An expensive 3D printer has the ability to use higher quality materials, and a receiver would NOT fail.
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  #13  
Old 12-10-2012, 5:48 AM
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Quote:
Originally Posted by JoeJinKY View Post
He used a very CHEAP 3D printer and a cheap material to make that receiver. The cheap 3D printers use ABS plastic, not unlike lawn sprinkler fittings. An expensive 3D printer has the ability to use higher quality materials, and a receiver would NOT fail.
Actually, they used a rather pricey Objet printer that uses a photopolymer. They ran into the same issue that I did with my ABS printed lower - namely, stress in the buffer tower. Whereas in my case the issue manifested itself as slight flexing causing cycling issues with .223, the very low impact strength of the photopolymer used in their test (coupled with the fact that it was a very high resolution print, with nice sharp 60 degree thread profiles creating a number of stress risers) caused a material failure after a few shots (but flawless cycling until breakage).

Just because a printer uses ABS does not mean that it's cheap - the Fortus line of machines (which is what Detroit Gun Works uses) begin at $45000 and run ABS.
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  #14  
Old 12-10-2012, 5:58 AM
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Thread title fail. The prototype firearm functioned for a while unlike this thread.
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  #15  
Old 12-10-2012, 6:00 AM
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Quote:
Originally Posted by Have Blue View Post
Actually, they used a rather pricey Objet printer that uses a photopolymer. They ran into the same issue that I did with my ABS printed lower - namely, stress in the buffer tower. Whereas in my case the issue manifested itself as slight flexing causing cycling issues with .223, the very low impact strength of the photopolymer used in their test (coupled with the fact that it was a very high resolution print, with nice sharp 60 degree thread profiles creating a number of stress risers) caused a material failure after a few shots (but flawless cycling until breakage).

Just because a printer uses ABS does not mean that it's cheap - the Fortus line of machines (which is what Detroit Gun Works uses) begin at $45000 and run ABS.
I wonder how it would stand up to a bolt action 50BMG upper? They don't put the same stress on the buffer tower.
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  #16  
Old 12-10-2012, 7:33 AM
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The 5.7 might be the wrong caliber for a printed lower. That buffer is super heavy...
Kevin
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  #17  
Old 12-10-2012, 9:47 AM
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Quote:
Originally Posted by CSACANNONEER View Post
I wonder how it would stand up to a bolt action 50BMG upper? They don't put the same stress on the buffer tower.
you crazy all the recoil force is placed on that since that is where the stock mounts
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Old 12-10-2012, 9:57 AM
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3D printing is amazing, but if people start "printing" guns, the BATFE could simply redefine what the restricted component is.

In Germany the controlled component of a firearm is the barrel. They are serialized to the gun. If you want to buy a conversion kit, it requires the same permit as another gun. Frankly, this makes sense since the barrel presumably is to hardest component to make.

Try 3D printing a barrel....
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  #19  
Old 12-10-2012, 10:07 AM
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LOL One day they will get it right
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Old 12-10-2012, 10:09 AM
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Very

http://www.calguns.net/calgunforum/s...d.php?t=652264

http://www.calguns.net/calgunforum/s....php?p=9858128

http://www.calguns.net/calgunforum/s...d.php?t=653651
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  #21  
Old 12-10-2012, 1:52 PM
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Quote:
Originally Posted by bohoki View Post
you crazy all the recoil force is placed on that since that is where the stock mounts
The forces from recoil are just compression and, that is limited since the upper receiver is right there. With a semi auto build, the forces from recoil and the forces from the buffer cycling beat the buffer tower in both directions. Even a .22lr upper is harder on a lower than a bolt action 50BMG is.
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  #22  
Old 12-10-2012, 8:00 PM
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Quote:
Originally Posted by CSACANNONEER View Post
The forces from recoil are just compression and, that is limited since the upper receiver is right there. With a semi auto build, the forces from recoil and the forces from the buffer cycling beat the buffer tower in both directions. Even a .22lr upper is harder on a lower than a bolt action 50BMG is.
That's amazing. I would have never imagined that. My only 50 experience is on an M2. I need to get behind a 50 bolt gun someday. Thanks for the the info.


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  #23  
Old 12-10-2012, 9:24 PM
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Hmmm, interesting. .
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Old 12-10-2012, 9:29 PM
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This is the front end of something very powerful....
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Old 12-10-2012, 11:16 PM
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High end 3 D printers can make high strength metal parts. Google laser sintering 3 d printers.
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Old 12-11-2012, 9:39 AM
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Could you print a new girlfriend to me. One that does not argue!.
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Old 12-11-2012, 9:46 AM
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When we can 3D print using titanium we will have something.

Didn't they print a steak recently?
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Old 12-11-2012, 10:12 AM
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Quote:
Originally Posted by Have Blue View Post
Actually, they used a rather pricey Objet printer that uses a photopolymer. They ran into the same issue that I did with my ABS printed lower - namely, stress in the buffer tower.
Have Blue! Welcome to CGN! There are many of us who have been following your progress and appreciate your publication of it. Given the readership and political situation in California, your posts here would be a welcome resource.

Did you ever apply the carbon fiber fix to your buffer tower?
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Old 12-11-2012, 12:40 PM
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Quote:
Originally Posted by winnre View Post
When we can 3D print using titanium we will have something.

Didn't they print a steak recently?
Done...

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