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3D Printed AR15 Much Improved, More Reliable

Discussion in 'General Gun Discussions' started by Dean Weingarten, Jan 11, 2013.

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  1. HorseSoldier

    HorseSoldier Member

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    If anyone is familiar with Mil-Spec Monkey, that guy started out as a computer programmer for a video game studio (and may still be doing that as his primary gig in addition to his line of morale patches and military gear). We should be careful not to dismiss entire demographic categories as against the 2A based on stereotypes.
     
  2. lumanaughty

    lumanaughty Member

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    Working for a large Internet company we have both pro-gun and anti-gun discussions on our internal mailing lists at times.

    One of bosses at the company took the entire group clay shooting one time for a "team building exercise". There is a mixture of people, but I would say most from Silicon Valley are not pro-gun. However, there's many that are.
     
  3. BHP FAN

    BHP FAN Member

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    so, wouldn't it be easier to build one in .22LR that would last? you could design them to take mags from the Colt/Umarex .22 M4.
     
  4. barnbwt

    barnbwt Member

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    I posted this email in a similar 3D SLA thread in Rifles; I'm gonna send it to Formlabs and see if they have an opinion on this "conundrum"

    Hopefully I'll hear back from them at some point and I will relate their opinion for all to consider :). Lemme know if you think I should ask anything else!

    TCB
     
  5. tekno

    tekno Member

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    ok Im a little confused - if you had the file couldn't you just use a CnC mill to make the parts.

    I went over to the CnCzone and found This thread that may help
     
    Last edited: Jan 15, 2013
  6. M-Cameron

    M-Cameron member

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    if you have a 3D part file, and the right software...then yes, it is pretty simple to CNC the parts.....assuming you know how to properly use the Software, how to set up a Mill and tool table, and how to fixture the parts properly, and assuming you have the $15,000 for a CNC machine.


    with a 3D printer.....you 'skin' the part with some software, and hit print.....
     
  7. barnbwt

    barnbwt Member

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    ^Sure could, it'd just be a lot more expensive and more difficult to get right. Programming toolpaths that do a good job creating the shape you want at the quality you want is more difficult than you'd think, seeing as it's automated.

    The beauty of Rapid Prototyping is that the software figures out what it needs to do to create the form you want, so your job basically ends once you have a solid model file available. Perhaps in a few years CNC/CAD will have progressed to this level, but not yet (so I still have a job ;))

    If I wasn't so sure it'd be a pain to learn to program for, I'd consider buying one of the <2000$ CNC setups you see on Ebay now and then (that's right Ebay, I'd use your own service against your anti-gun agenda :evil:)

    TCB
     
  8. Diamondback6

    Diamondback6 Member

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    barnbwt, best not to press--for now, take their silence as some degree of tacit approval. Why rock the boat when they haven't said anything one way or the other?
     
  9. Lucifer_Sam

    Lucifer_Sam Member

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    This:

    or this:

    plus this:

    And I'd bet you could get something that would last a really long time.

    Since it cracked through the rear takedown pin you might be able to thicken that area of the receiver externally for reinforcement and put a longer pin in. Thats what I would be looking at doing, at least. Longer takedown pins shouldn't be too hard to fabricate.
     
  10. TheGloriousTachikoma

    TheGloriousTachikoma Member

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    The problem is work size. Integrating the buttstock increases the length quite a bit and most 3D printers that are marketed for 'home/hobby' use don't have much more work area than a lower or a magazine.

    About the only way to do it would be to build a RepRap and double the X-axis. But then the software would need to be changed...

    But something else that could be done is the integration of a spare mag holder, like the Kel-Tec SU-16A/B/CA or the new stock from Mako.
     
  11. barnbwt

    barnbwt Member

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    Larger RP forms are frequently made as interlocking pieces that are then glued together with epoxy that is stronger than the RP material itself. A little bit of finish work, but not much. These forms are also sometimes strengthed by "varnishing" with the same epoxy, or even by laminating fibers onto them.

    At present, DD seems to be trying to copy existing designs, see where they fail, and adjusting accordingly. Iterative, but it will eventually work. They'll probably end up with a fairly durable lower/upper/stock strategically reinforced with simple sheetmetal parts (high wear, high stress areas). Hard to ask for more, really; an AR15 as easy to home build as a tube gun?:cool:

    TCB
     
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