Conscious Choice cover

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.


“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.


Available everywhere for $3.99 (before discount) at Amazon, Barnes & Noble, and all ebook vendors, or direct from the ebook publisher, ebookit. And if you buy it from ebookit you don't support the big tech companies and I get a bigger cut much sooner.

A Texas-based company has printed the first 3D-printed metal pistol, a 45 caliber Model 1911.

A Texas-based company has printed the first 3D-printed metal pistol, a 45 caliber Model 1911.

Video below the fold. The gun clearly functions, though I noticed that in the video they never loaded more three rounds in a magazine, and that the gun seems to cycle weakly. I suspect that they had some feeding problems when they tried to fire a full loaded five round magazine.

Nonetheless, this achievement further illustrates that 3D printing is about to become a major method of manufacture.


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  • Pzatchok

    It looks like it was sticking in the full back position. That is indicative of a weak main spring or bad fitting parts. Both easily fixed.

    They did say that the beaver tail safety, the springs, the magazine and the barrel are all purchased parts and not made by them with their laser system.

    Basically they made all the parts that could have been made out of polymer like on a Glock or M&P out of metal instead.

    Nice proof of concept though. The gun even looked pretty good to.

  • Tom Billings

    Dr. John Lewis has been advocating for some time that space-based industry use 3-d Laser Chemical Vapor Deposition (LCVD) printing, with metal carbonyls as the stock material. They could use native Nickel/Iron bits as their starting point, and the Mond Process should make those into Iron Pentacarbonyl and Nickel Tetracarbonyl easily. Most larger carbonyl-sourced CVD pieces here on Earth are done with molds. The process can give nice dense strong solid pieces.It would be interesting to see an LCVD-produced gun, and compare them with the Laser-sintered from metal powder gun. LCVD *might* produce a good barrel, even. I understand that the problems with metal carbonyl toxicity restricts such applications here in an atmosphere, where the carbonyls can build up around the equipment using them as stock. I wonder if LCVD would have as many toxicity problems down here.

    In the vacuum of Space that toxicity isn’t a problem, since escaping carbonyls will quickly crack into carbon monoxide and metal dust. LCVD in those situations could provide much of what is needed for many applications. I believe that it may provide an interesting composite as well. The Carbonaceous Chondrite asteroids can not only provide all the element combos needed for the Mond Process, but their Carbon can be used to make graphene. In simple graphene nano-platlets, graphene is being already experimented with for stiffening and strengthening both plastic and metal composites. Now that large graphene sheets can be produced, according to Columbia University’s team, with 90 percent of the strength of the platelets, that could make LCVD deposited metal matrix material for space structures with far better characteristics than we can make them here.

  • Prokop Hapala

    Hello, I’m quite interested in Laser Chemical Vapor Deposition (LCVD) 3D printer of metal carbonyls. I was just googling on this topic, and only meaningful page what I found was your post. Can you please give me some references (web page, paper DOI or something) on this topic?
    Thank you

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