New 3D Printed Rifle Magazine Feeds Hundreds of Rounds

The CuomoDefense DistributedThe contest between government officials' desire to control everything and independent-minded tinkerers' ability to put things entirely beyond control continues, with the tinkerers enjoying yet the latest victory. Sen. Dianne Feinstein may want to limit firearms magazines to ten rounds, and New York may have limited them to seven rounds, but Defense Distributed has developed a 30-round magazine design for AR-style rifles that can be created in the privacy of your own workshop on a 3D printer and relied upon to last for hundreds of shots. The new magazine is a completely reworked design, dispensing with flaws that limited the utility of earlier efforts

Appropriately enough, the new magazine is dubbed the "Cuomo," after New York's control-freaky governor. According to Wired:

In recent tests at a gun range near Austin, Texas, Defense Distributed fired a total of 342 rounds using the magazine with no issues, according to the group’s founder, Cody Wilson. The group fired 227 of those rounds using full automatic fire, while swapping out the barrels on the rifle to keep them cool.

On the video below, the new magazine can be seen standing up to the demands of full-automatic fire. You can find Defense Distributed's designs for the Cuomo, and for other gun parts and accessories, at DefCad.

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  • Velcro Bootstraps||

    I'd buy one.

  • ||

    I'd print one.

  • Rich||

    the new magazine is dubbed the "Cuomo,"

    Goons kicking DefDist's door in 3, 2, 1, ....

  • Bam!||

    Weren't they already visited by the ATF?

  • The Late P Brooks||

    Just wait 'til he takes that to the range and some noble law abiding citizen calls the SWAtters.

  • Tim||

    Print it, sure, get caught with it, go to prison.

  • Romulus Augustus||

    What do these 3-d printers cost? I heard of some special machining company paying someting on order of $1/4 million for one to do one-off speciality parts.

  • Fatty Bolger||

    The home ones are $500 to $2-3K, depending on size and capability.

  • Brett L||

  • Brett L||

    Shit. Close tag elided.

  • Almanian!||

    Kick ass - thanks for the link!

  • db||

    What file formats does your CNC work with? If you were to make a prototype for someone how would you charge?

  • Brett L||

    I use Slic3r, which accepts STL, AMF, and OBJ formatted files and makes G-Code for the printer. If they gave me something in that format, I'd probably charge $25-50 (5"x5"x4" max print size, so small objects) depending on the fill level, which is directly related to printer time and filament consumption. Talking to a friend who does this professionally, 40% fill is fine for anything structural and 10% fill is more than adequate for cute 3D jewjaws.

    My friend has the coolest job ever, he works for the FSU Art Dept on exploring how 3D printing can be used for art and other disciplines. He's currently assembling a printer with a 6'x6'x4' print area that will print about 30lb/hr.

  • Almanian!||

    "jewjaws"

    RAAAACIST!

  • Corneliusm||

    The ones that print ABS plastic parts run for anywhere between $600 and up.

  • Brett L||

    Got the 3D printer up and running last night. Unfortunately, the printable area is about 5"x5"x4", so the first thing I have to do is get a bigger printer before I can start doing this stuff. However, I've got most of the parts, just need a bigger bed, and I can get to doing some of this stuff. I may print a scale model AR receiver for fun.

  • SugarFree||

    Print a bigger printer. Duh.

  • Brett L||

    Yeah. I'm working on that, too,

  • Tim||

    Print that trillion dollar coin.

  • robc||

    A friend of mine is getting one and the advice given him was that the first thing you print is replacement parts for the parts that wear out first on the printer.

  • Brett L||

    Yep. A friend actually has one that has some parts from one run and some from another and one doesn't quite fit. We're printing him a new one and some spares in the next run. Also, some clips to keep the glass on the bed better.

  • Bill Foster||

    Same thing that's been done with mills and lathes since invented. Guide bars and square cut screws are what you make to practice, and when you're done you have spare parts.

  • ||

    Does it come in black?

  • SugarFree||

    Racist.

  • The Late P Brooks||

    Does it come in black?

    You've never heard of MarHyde bumper paint?

  • db||

    What kind of springs did they use?

  • Almanian!||

    "assault"-style, 30-round clips

    *runs away*

  • Brett L||

    Looks like Wolff gunsprings part no 60905 according to comments on the site.

  • Brett L||

    Or here. Or here.

  • db||

    BAN GUNSPRINGS!!!

  • IceTrey||

    If the manufacturing of 30 round mags is banned then you will be committing a federal offense when you print one. Now the exact same mag that holds 30 rounds of 5.56 only holds 10 rounds of .458 SOCOM. So, is it a 30 rounder or a 10?

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