what would it take to produce printed armor? --- On Mon, 10/15/12, Igor Chudov <ichu...@gmail.com> wrote:
> From: Igor Chudov <ichu...@gmail.com> > Subject: Re: [Emc-users] Crowdsourced mass CNC produced private weapons > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Date: Monday, October 15, 2012, 6:33 AM > Matt, thanks for a clarification. I > do not think that a plastic AK receiver > would work well, but it looks like an AR lower has different > strength > requirements. > > i > > > On Mon, Oct 15, 2012 at 7:19 AM, Matthew Herd <herd.m...@gmail.com> > wrote: > > > Igor, > > > > >From a technical standpoint only (I'll leave the > politics out of this), > > the AR-15 lower receiver (which he successfully printed > in ABS plastic - > > see www.defensedistributed.com) is the portion which > houses the fire > > control group. Most are made of 7075 Al forgings, > or CNC machined from > > billet. However, a few companies offer injection > molded varieties which > > work just fine. I think the original Armalite > designers used 7075 to be on > > the safe side, not because they had to. With some > adjustments & > > reinforcements, it is probably possible to 3d print a > plastic AR lower > > which would function perfectly. I seem to recall > 3d printed ABS is about > > 70% as strong as molded ABS so some minor structural > reinforcements are > > probably in order. No selective laser sintering > or other expensive 3d > > printing processes required. > > > > And yes, that article is obviously political. > However, there are a few > > others on the subject (search 3d printer, defense > distributed, etc) that > > present the facts more clearly. I think the > wired.com article that I > > read wasn't too bad, in case you want to read more on > the subject. > > > > Matt > > > > > ------------------------------------------------------------------------------ > > Don't let slow site performance ruin your business. > Deploy New Relic APM > > Deploy New Relic app performance management and know > exactly > > what is happening inside your Ruby, Python, PHP, Java, > and .NET app > > Try New Relic at no cost today and get our sweet Data > Nerd shirt too! > > http://p.sf.net/sfu/newrelic-dev2dev > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Don't let slow site performance ruin your business. Deploy > New Relic APM > Deploy New Relic app performance management and know > exactly > what is happening inside your Ruby, Python, PHP, Java, and > .NET app > Try New Relic at no cost today and get our sweet Data Nerd > shirt too! > http://p.sf.net/sfu/newrelic-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
