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3D printed AR15 3rd Generation Ready for Download (600 rds, no wear)
Gun Watch ^ | 26 February, 2012 | Dean Weingarten

Posted on 02/26/2013 6:54:41 AM PST by marktwain

3D printed AR15 3rd Generation Ready for Download (600 rds, no wear)

Defense distributed announced that their 3rd generation of 3D printed lowers is ready for distribution. No one knows what the expected life of this lower will be, as it has been used to fire 600 rounds in rapid succession without discernible damage.

In the video, right and left handed shooters switch places while firing the test rounds in rapid semi-action mode. It is clear that the shooters are starting to suffer from hand fatigue from so much trigger action.

The lower receiver design has been reinforced. The upper used is a direct gas impingement type. I would expect that a piston driven design would also work, and might create less potential problems as there would be no hot gases ejected into contact with the lower receiver.

No one knows what the service life of this receiver will be, but 600 rounds without detectable problems is a good start.

Link to Announcement at KeepAndBearArms

Link to video

©2013 by Dean Weingarten Permission to share granted as long as this notice is included.


TOPICS: Business/Economy; Hobbies; Politics; Society
KEYWORDS: 3dprinting; ar15; banglist; defensedistributed
3D printing and Defense Distributed are making great progress. A 600 round lower is certainly usable, and that is the minimum that this design is good for. No one knows what the service life will be.
1 posted on 02/26/2013 6:54:50 AM PST by marktwain
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To: marktwain

If the time ever came that this was all that was available, 600 rounds would be more than enough.


2 posted on 02/26/2013 7:01:05 AM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: DuncanWaring
If the time ever came that this was all that was available, 600 rounds would be more than enough.

Heh.
The modern version of the WWII single shot "get yourself a real weapon" pistol.

3 posted on 02/26/2013 7:04:22 AM PST by grobdriver (Vivere liberi aut mori)
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To: grobdriver

4 posted on 02/26/2013 7:11:14 AM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: marktwain

I’ve heard about this kind of printing. (Insomnia-Coast to Coast). Last few nights they ran the show of the uber-smarty who kind of explained it.

We are in for some wild tech. Frankly....if everybody has a gun...I’m in. At least we can have a fair fight.

I’m sick of Down Low Barry and Shemale Evitawannabe....it’s getting rather clear they are prepping for cwII.

Sad....But, be prepared.


5 posted on 02/26/2013 7:21:56 AM PST by Pigsley (nan)
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To: DuncanWaring
An even easier zip gun can be made from a staple gun:


Cheers!
6 posted on 02/26/2013 7:34:17 AM PST by DoctorBulldog (Obama sucks. End of story.)
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To: marktwain

7 posted on 02/26/2013 7:37:57 AM PST by DoctorBulldog (Obama sucks. End of story.)
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To: marktwain

Don’t tell the US government, or they will want a database and background checks for 3D printers


8 posted on 02/26/2013 7:40:54 AM PST by drinktheobamakoolaid (If we falter and lose our freedoms, it will be because we destroyed ourselves. Abraham Lincoln)
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To: DuncanWaring
Hmmm... Let me try posting that photo, again:


Cheers!
9 posted on 02/26/2013 7:44:24 AM PST by DoctorBulldog (Obama sucks. End of story.)
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To: marktwain

I need to get some ammo ink cartridges for my printer...


10 posted on 02/26/2013 7:50:06 AM PST by Vaquero (Don't pick a fight with an old guy. If he is too old to fight, he'll just kill you.)
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To: marktwain
From a link from the Gun Watch blog:

"Defense Distributed's latest 3D printed AR-15 lower withstood 600+ nearly continuous rounds and still did not fail. Note: A direct gas impingement upper was used, not a piston (which diverts the hot gases out the front of the upper). The lower design was verified using a cheaper 3D printing technology - extruded ABS - and didn't show any signs of damage from shooting at a high rate of fire. 3D printed AR-15 lowers have arrived."

They must have strengthened the areas that failed before and looks like they can fire many more rounds out of the lower before failure.

11 posted on 02/26/2013 8:28:56 AM PST by Red Steel
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To: DuncanWaring

This might sound a little silly, but for the techies out there - what about 3D faxing? Would it be possible to have an AR15 and 600 rounds faxed to someone?


12 posted on 02/26/2013 8:31:45 AM PST by AD from SpringBay (We deserve the government we allow.)
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To: drinktheobamakoolaid

“Don’t tell the US government, or they will want a database and background checks for 3D printers”

I’m sure your statement is tongue-in-cheek — or maybe not?

The powers-that-be must be watching the fledgling “print your own gun” movement with fear in their hearts.

Regardless how strict the laws limiting purchasing of guns and rifles become — what if folks could just download freely-available files, and print up weapons of their own?

I sense that as the “print-your-own” weapons movement burgeons, we’ll see increasing moves by government to restrict the sale of ammunition. We’re seeing that now in places like New York state, etc.

The “defense distributed” guys better be watchin’ their backs...


13 posted on 02/26/2013 8:46:43 AM PST by Road Glide
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To: marktwain

3-d printer is officially on my wish list.


14 posted on 02/26/2013 9:00:31 AM PST by zeugma (Those of us who work for a living are outnumbered by those who vote for a living.)
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To: reed13

bfl


15 posted on 02/26/2013 9:13:14 AM PST by reed13k (For evil to triumph it is only necessary for good men to do nothing.)
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To: AD from SpringBay

A. To receive a “3D Fax” you’ve got to have a 3D printer. At that point the recipient just downloads the 3D data file and hits “Print”.

B. Ammunition cannot be generated by the 3D printing process, and probably never will be.


16 posted on 02/26/2013 9:50:33 AM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: Road Glide
The powers-that-be must be watching the fledgling “print your own gun” movement with fear in their hearts.

I'm sure there are savvy ones who are. Frankly I think that 3D printing is over the head of the average anti-gun political nabob. At some pont DiFi's staff will discuss them with her and she'll make an incoherant statement about "assault printers" that the press will breathlessly parrot.

That said, we should download the files ASAP. I suspect the first avenue of attack will be to pressure ISPs and host domains to shut down the 3D printing groups and file servers. A lot of them appear to be hosted by schools, and these are going to be very vulnerable.

17 posted on 02/26/2013 10:41:29 AM PST by jboot (This isn't your father's America. Stay safe and keep your powder dry.)
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To: DuncanWaring
B. Ammunition cannot be generated by the 3D printing process, and probably never will be.

we'll see about that. Propellant may be plasticized and extruded, y'know.

18 posted on 02/26/2013 12:01:41 PM PST by no-s (when democracy is displaced by tyranny, the armed citizen still gets to vote)
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To: no-s; All
You make a good point. A 3D printer can easily be operated from a distance, and in a pinch, you might be willing to lose one now and then if you could make ammunition with it....

Maybe someone will figure a way to print detonators with it. They are the only really touchy and difficult part of explosives to make. Perhaps a printer that has two print “reservoirs” for dual based primary explosives, that mixed together give you what you want, in very precise, controlled quantities....

19 posted on 02/26/2013 12:30:49 PM PST by marktwain (The MSM must die for the Republic to live. Long live the new media!)
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To: drinktheobamakoolaid

Here is a site that discusses 3D printers that can be used to print more 3D printers...

http://www.reprap.org/wiki/RepRap


20 posted on 02/26/2013 12:42:23 PM PST by marktwain (The MSM must die for the Republic to live. Long live the new media!)
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To: no-s

“Plasticized and extruded” is not “3D printed”.


21 posted on 02/26/2013 1:02:54 PM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: no-s

perhaps never, however I am starting to see proof of concept railguns being built at home ala youtube.

http://www.youtube.com/watch?v=shw4lLI45U0

and

http://www.youtube.com/watch?v=RTgx56W-KYI

and

a host of others.

DC is just torys who think taking muskets will give them job secuirty.


22 posted on 02/26/2013 1:04:15 PM PST by longtermmemmory (VOTE! http://www.senate.gov and http://www.house.gov)
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To: marktwain

you have just triggered the thought crime alert system.

thought of any kind will not be tollerated unless sanctioned by “the deciders”.

(/sarcasm)


23 posted on 02/26/2013 1:15:54 PM PST by longtermmemmory (VOTE! http://www.senate.gov and http://www.house.gov)
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To: marktwain

you have just triggered the thought crime alert system.

thought of any kind will not be tollerated unless sanctioned by “the deciders”.

(/sarcasm)


24 posted on 02/26/2013 1:19:40 PM PST by longtermmemmory (VOTE! http://www.senate.gov and http://www.house.gov)
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To: DuncanWaring
“Plasticized and extruded” is not “3D printed”.

What's your point? Do you know the most common varieties of 3D printer work by softening plastic and extruding it with pinpoint precision (literally pinpoint)?

25 posted on 02/26/2013 1:33:33 PM PST by no-s (when democracy is displaced by tyranny, the armed citizen still gets to vote)
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To: no-s

That makes as much sense as 3D-printing snowflakes and then compressing them, rather than just making ice-cubes in your freezer.

Where are you going to get the nitrocellulose goo to extrude the powder granules from?


26 posted on 02/26/2013 1:49:14 PM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: Road Glide
“Don’t tell the US government, or they will want a database and background checks for 3D printers”

Back when color printers got good enough to print realistic counterfeit money, the feds made the printer manufacturers embed a yellow dot pattern into color images which would identify the printer used.

Expect them to cover their bases with this new technology by (A) making the printer put in identifying features in the things made, and (B) pressuring the printer manufacturers to have the software reject anything that looks like a gun.

27 posted on 02/26/2013 3:38:49 PM PST by PapaBear3625 (You don't notice it's a police state until the police come for you.)
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To: DuncanWaring
That makes as much sense as 3D-printing snowflakes and then compressing them, rather than just making ice-cubes in your freezer.

Where are you going to get the nitrocellulose goo to extrude the powder granules from?

That's really a good analogy. OTOH I really like shaved ice and dippin' dots. And where do glaciers come from?

Jeez, how do they make powder in the first place? It's got multiple goo stages in it. Nitrocellulose is a resin. I suspect propellant can be incorporated into filament. I'm not willing to go into too much detail in public, but solid propellant grains can be made to burn pretty quick without detonating. Also some things are more efficient and also have a higher regression rate than double-based powder. Look to hobby rocketry for some ideas. The sky is the limit. so to speak. Think outside the brass.

That being said, the overall effectiveness of modern ammunition is pretty hard to beat, and bench loading technology is readily available. Today there may be no point to 3-d printing ammo other than for bragging rights...computerized 3d printing can be easily be tremendously slower than traditional human-actuated machining. Speaking from bitter personal experience. 3d printing works best when it replaces multiple steps in the design or production flow, or allows some similar shortcut.

28 posted on 02/26/2013 5:22:34 PM PST by no-s (when democracy is displaced by tyranny, the armed citizen still gets to vote)
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To: marktwain
Easy Link :

http://defensedistributed.com/

****************************************EXCERPT****************************************

Defense Dist.

home of the wiki weapon project

Watch video

Spread the word

Home of the Wiki Weapon project. A nonprofit effort to create freely available plans for 3D printable guns.

29 posted on 04/08/2013 11:41:38 AM PDT by Ernest_at_the_Beach ((The Global Warming Hoax was a Criminal Act....where is Al Gore?))
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