The Firing Line Forums

Go Back   The Firing Line Forums > The Conference Center > Law and Civil Rights

Reply
 
Thread Tools
Old December 5, 2012, 10:30 PM   #26
egor20
Senior Member
 
Join Date: November 14, 2010
Location: Northern Virginia
Posts: 1,762
The idea of using a 3-D printer to create a gun is controversial and interesting, but it seems to still be a ways off from equaling the quality of machined parts. A gun with a major part printed that way failed after just six shots when some enthusiasts decided to give the tech a try.

Creating a printable gun is the project of Defense Distributed, which is working on what it calls the WikiWeapon. But the effort isn't far enough along to create a working firearm, so Defense Distributed used a design created by another printed-gun creator who goes by the name HaveBlue.

HaveBlue claimed in July to have fired his printed gun hundreds of times, which doesn't seem impossible given the quality of the printing. The part printed by the group is called the lower receiver, which is where a round is received from the magazine. Pictures show it to be very well made, and it appears to fit exactly to the other parts in the gun kit they used.

But the pressure of the recoil appears to have been too much for the "buffer ring," which separates the stock from the upper receiver. After firing just six shots, the gun split in two. It's a serious setback, especially considering they were firing a lower-caliber cartridge than the gun would normally shoot.
http://www.nbcnews.com/technology/fu...part-1C7404226


http://www.youtube.com/watch?feature...&v=wuDCW_Rn5JI
__________________
Chief stall mucker and grain chef

Country don't mean dumb.
Steven King. The Stand
egor20 is offline  
Old December 5, 2012, 11:23 PM   #27
johnwilliamson062
Senior Member
 
Join Date: May 16, 2008
Posts: 6,844
5.7 isn't that far behind 223.
__________________
$0 of an NRA membership goes to legislative action or court battles. Not a dime. Only money contributed to the NRA-ILA or NRA-PVF. You could just donate to the Second Amendment Foundation
First Shotgun Thread First Rifle Thread First Pistol Thread
johnwilliamson062 is offline  
Old December 6, 2012, 12:08 AM   #28
Onward Allusion
Senior Member
 
Join Date: November 17, 2009
Location: IN
Posts: 1,799
Rather than printing an AR receiver outright, couldn't one print a mold for investment casting instead? Much less reliant on the polymer materials. Strictly theory, of course.
__________________
"You haven't lived until you've died." - various
Onward Allusion is offline  
Old December 6, 2012, 03:00 AM   #29
FrankenMauser
Senior Member
 
Join Date: August 25, 2008
Location: 1B ID
Posts: 6,969
Yes, you could.

However, it would be just as easy to have an investment casting company 3D-print the mold for you, with one of their wax or green sand printers. Or... just have them cast the receivers.

I'm all for doing something myself, and I do see myself using 3D printing for prototyping very soon. ...but we're not quite to the point that receivers can be affordably printed in a usable state.
__________________
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."
FrankenMauser is offline  
Old December 6, 2012, 06:26 AM   #30
iraiam
Senior Member
 
Join Date: September 6, 2012
Location: Lakewood, CO
Posts: 875
If it is possible to build a gun or parts reliably and cheaply with this method, I am sure someone will go into legitemate business doing it and we won't need Staples 3d printers.
__________________
NRA Lifetime Member Since 1999

"I ask, sir, what is the militia? It is the whole people except for a few public officials." George Mason
iraiam is offline  
Old December 7, 2012, 12:19 AM   #31
johnwilliamson062
Senior Member
 
Join Date: May 16, 2008
Posts: 6,844
I doubt anyone will be using this technology to manufacture firearms for mass retail sale. PIM is definitely a better process for that and I don't see this catching up in that regard even as this technology improves, but...

I think the injection mold press used for the AR lowers probably runs about $250,000, based on my limited knowledge of injection molding and guesses as to pressure and mold size. The mold then costs $35,000 for a "cheap" aluminum mold. Then look at EPA requirements for the operation, infrastructure requirements, etc. Especially power.

If you want to build one yourself, and many do, this option is a whole lot more attractive.

Making a model and then a casting is an interesting option. I wonder how a glass lower would handle 22lr..
__________________
$0 of an NRA membership goes to legislative action or court battles. Not a dime. Only money contributed to the NRA-ILA or NRA-PVF. You could just donate to the Second Amendment Foundation
First Shotgun Thread First Rifle Thread First Pistol Thread
johnwilliamson062 is offline  
Old December 7, 2012, 09:33 AM   #32
JimPage
Senior Member
 
Join Date: February 21, 2010
Location: Rome, NY
Posts: 650
Check out this attempt to make one.

http://www.dailytech.com/3D+Printed+...ticle29339.htm
__________________
Jim Page

Cogito, ergo armatum sum
JimPage is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:53 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07776 seconds with 9 queries