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Fact checking of some assumption of existence. * «MPEG 3»: Yeah, sure. * «We can print working guns right now»: No, you cannot, neither you will be able in th

by gioele 14y ago

Fact checking of some assumption of existence. * «MPEG 3»: Yeah, sure. * «We can print working guns right now»: No, you cannot, neither you will be able in the foreseeable. Please prove otherwise.

deleted 14y ago
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andrewflnr 14y ago
He did. Six shots is merely an unreliable gun, not, fundamentally, a non-functional gun (see also the point about 6-vs-100 shots and 0-vs-1 shot), and frankly, an AR-15 seems unnecessarily ambitious for a proof-of-concept. They probably would have gotten better results with something better suited for printing; I bet AK's print better. AFAICT, it's just a matter of sufficient precision with sufficiently strong materials.
- angersock 14y ago
  Well, in case anyone's curious: http://www.lasc.us/SAAMIMaxPressure.htm http://www.lasc.us/SAAMIMaxPressure.htm http://www.matbase.com/material/polymers/commodity/abs-general-purpose/properties http://www.matbase.com/material/polymers/commodity/abs-gener... http://en.wikipedia.org/wiki/Cylinder_stresses http://en.wikipedia.org/wiki/Cylinder_stresses That's a start, anyways.
doctorpangloss 14y ago
Here are a few simple methods to make working guns with 3D printers. 1. Print plastic shaped like gun 2. Load bullet. 3. Fire bullet with now destroyed gun. 1. Model gun 2. Print wax cast 3. Make cast 4. Melt and pour steel into cast. 1. Buy everything except a upper receiver without a gun permit. 2. 3D print an upper receiver and attach to normal gun parts. 3. Use like normal gun (for a little bit)
ampersandy 14y ago
http://www.youtube.com/watch?v=FLlJshR6nvg http://www.youtube.com/watch?v=FLlJshR6nvg One of the major arguments in the article is that instructions exist for printing an Assault Rifle (AR). I doubt that the rounds fired have the same lethal capacity of a "real" firearm; however, I certainly wouldn't want to be hit by the weapon in the video.
- othermaciej 14y ago
  The "AR" in "AR-15" stands for "ArmaLite", the original manufacturer, not for "Assault Rifle". An AR-15 is not actually an assault rifle, which implies the capability of fully automatic fire (pull the trigger, spray bullets). The AR-15 is semi-automatic (one shot per trigger pull, but with no manual action required to reload). http://en.wikipedia.org/wiki/AR-15 http://en.wikipedia.org/wiki/AR-15
  - ampersandy 14y ago
    Interesting, thanks for the clarification.

by gioele 14y ago

deleted 14y ago

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andrewflnr 14y ago

He did. Six shots is merely an unreliable gun, not, fundamentally, a non-functional gun (see also the point about 6-vs-100 shots and 0-vs-1 shot), and frankly, an AR-15 seems unnecessarily ambitious for a proof-of-concept. They probably would have gotten better results with something better suited for printing; I bet AK's print better. AFAICT, it's just a matter of sufficient precision with sufficiently strong materials.

angersock 14y ago
Well, in case anyone's curious: http://www.lasc.us/SAAMIMaxPressure.htm http://www.lasc.us/SAAMIMaxPressure.htm http://www.matbase.com/material/polymers/commodity/abs-general-purpose/properties http://www.matbase.com/material/polymers/commodity/abs-gener... http://en.wikipedia.org/wiki/Cylinder_stresses http://en.wikipedia.org/wiki/Cylinder_stresses That's a start, anyways.

doctorpangloss 14y ago

Here are a few simple methods to make working guns with 3D printers. 1. Print plastic shaped like gun 2. Load bullet. 3. Fire bullet with now destroyed gun. 1. Model gun 2. Print wax cast 3. Make cast 4. Melt and pour steel into cast. 1. Buy everything except a upper receiver without a gun permit. 2. 3D print an upper receiver and attach to normal gun parts. 3. Use like normal gun (for a little bit)

ampersandy 14y ago

http://www.youtube.com/watch?v=FLlJshR6nvg http://www.youtube.com/watch?v=FLlJshR6nvg One of the major arguments in the article is that instructions exist for printing an Assault Rifle (AR). I doubt that the rounds fired have the same lethal capacity of a "real" firearm; however, I certainly wouldn't want to be hit by the weapon in the video.

othermaciej 14y ago
The "AR" in "AR-15" stands for "ArmaLite", the original manufacturer, not for "Assault Rifle". An AR-15 is not actually an assault rifle, which implies the capability of fully automatic fire (pull the trigger, spray bullets). The AR-15 is semi-automatic (one shot per trigger pull, but with no manual action required to reload). http://en.wikipedia.org/wiki/AR-15 http://en.wikipedia.org/wiki/AR-15
- ampersandy 14y ago
  Interesting, thanks for the clarification.