Sipsey Street Irregulars: The Evolution of 3-D Printed Firearms

Saturday, March 28, 2015

The Evolution of 3-D Printed Firearms

We don’t know if Defense Distributed will succeed in printing a carbon fiber lower receiver. But at some point, rapid advances in 3-D printing technology ensure that someone will.

3 comments:

Anonymous said...: Currently, 3D printers print mostly in plastic, but there is a way, with a bit of extra work, to effectively 3d print a lower receiver in aluminum.

First, the lower is printed out of PLA plastic, but 2% larger in scale than the final product.

The print is then cast in a plaster/sand mixture and allowed to cure. Use pieces of cut styrofoam to mark where the mold gates and risers will be, and make sure they extend past the mold.

A charcoal-fired backyard aluminum foundry is simple to construct using a metal bucket, some metal pipe, a hair dryer (for your bellows) and some plaster/sand mix. Look it up on youtube.

The plaster cast, containing the plastic casting core, is placed into the furnace and allowed to cook until all of the 3D-printed plastic has melted and burned out of the mold.

The mold is removed from the furnace, and that same foundry is then used to melt down aluminum cans (and perhaps a small alloy of copper) in a crucible.

Pour that aluminum into the mold, allow everything to cool, and voila. You have your very own home-cast lower. Final finishing work may be necessary, and make sure to check all of your final dimensions and specs.; March 28, 2015 at 8:09 PM
Anonymous said...: Awesome progress in firearm freedom. ANd it can only get better. Pandora's box has been opened, and it does no good for the gun-banners to shut it.

But I am in awe seeing the short video clip (two links over), watching that man firing an untested weapon, held tight against his face and shoulder.

B Woodman
III-per; March 28, 2015 at 9:15 PM
Anonymous said...: I down loaed DD stuff before the Facist State dept capped them. I haven't spread it due to Meta-Data and me not
being computer savy.
When i can clean my digital print i'll spread it. Till then...
Back to my shadows
Ohhh, i know i leave prints here... Maybe cause i like fishing. Very relaxing sport you know. ;); March 28, 2015 at 11:25 PM

"Progress made under the shadow of the policeman's club is false progress."

I believe that liberty is the only genuinely valuable thing that men have invented, at least in the field of government, in a thousand years. I believe that it is better to be free than to be not free, even when the former is dangerous and the latter safe. I believe that the finest qualities of man can flourish only in free air – that progress made under the shadow of the policeman's club is false progress, and of no permanent value. I believe that any man who takes the liberty of another into his keeping is bound to become a tyrant, and that any man who yields up his liberty, in however slight the measure, is bound to become a slave. -- H.L. Mencken

"The Fate of Unborn Millions. . ."

"The time is now near at hand which must probably determine, whether Americans are to be, Freemen, or Slaves; whether they are to have any property they can call their own; whether their Houses, and Farms, are to be pillaged and destroyed, and they consigned to a State of Wretchedness from which no human efforts will probably deliver them. The fate of unborn Millions will now depend, under God, on the Courage and Conduct of this army-Our cruel and unrelenting Enemy leaves us no choice but a brave resistance, or the most abject submission; that is all we can expect-We have therefore to resolve to conquer or die." -- George Washington to his troops before the Battle of Long Island.

"We will not go gently . . ."

This is no small thing, to restore a republic after it has fallen into corruption. I have studied history for years and I cannot recall it ever happening. It may be that our task is impossible. Yet, if we do not try then how will we know it can't be done? And if we do not try, it most certainly won't be done. The Founders' Republic, and the larger war for western civilization, will be lost.

But I tell you this: We will not go gently into that bloody collectivist good night. Indeed, we will make with our defiance such a sound as ALL history from that day forward will be forced to note, even if they despise us in the writing of it.

And when we are gone, the scattered, free survivors hiding in the ruins of our once-great republic will sing of our deeds in forbidden songs, tending the flickering flame of individual liberty until it bursts forth again, as it must, generations later. We will live forever, like the Spartans at Thermopylae, in sacred memory.

-- Mike Vanderboegh, The Lessons of Mumbai:Death Cults, the "Socialism of Imbeciles" and Refusing to Submit, 1 December 2008

"A common language of resistance . . ."

"Colonial rebellions throughout the modern world have been acts of shared political imagination. Unless unhappy people develop the capacity to trust other unhappy people, protest remains a local affair easily silenced by traditional authority. Usually, however, a moment arrives when large numbers of men and women realize for the first time that they enjoy the support of strangers, ordinary people much like themselves who happen to live in distant places and whom under normal circumstances they would never meet. It is an intoxicating discovery. A common language of resistance suddenly opens to those who are most vulnerable to painful retribution the possibility of creating a new community. As the conviction of solidarity grows, parochial issues and aspirations merge imperceptibly with a compelling national agenda which only a short time before may have been the dream of only a few. For many Americans colonists this moment occurred late in the spring of 1774." -- T.H. Breen, The Marketplace of Revolution: How Consumer Politics Shaped American Independence, Oxford University Press, 2004, p.1.

Sipsey Street Irregulars

Saturday, March 28, 2015

The Evolution of 3-D Printed Firearms

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