"But can we make guns with it?"

3D printing needs to get away from this question.

For a particular type of entrepreneur, the first question asked about any innovation is: “Can we make weapons using it?” Self-styled crypto-anarchist and founder of Defense Distributed (DefDist) Cody Wilson, is one such individual. Recognising the potential of increasingly affordable 3D printing technology, not to mention his desire to "defend the civil liberty of popular access to arms," thus presumably spreading crypto-anarchy, the 25-year-old law student at the University of Texas made the plans for the gun available online.

Anyone familiar with Airfix kits will be familiar with the appearance of the component parts of the Liberator, minus the surplus plastic flash from popping them out of the sprue. Just 15 plastic elements make up the weapon, plus two metals ones – the firing pin and a single screw – including complex structures like springs. Designed to fire standard handgun rounds, the gun is also fitted with an interchangeable barrel to handle a broad spectrum of calibre rounds.

3D printers use a digital design to create a solid object by depositing tiny droplets of molten plastic layer upon layer until the shape is complete. They were originally the preserve of design studios and prototyping and testing laboratories, but now prices have dropped to £1,000 for a domestic model, purchasing one is no longer unattainable by the general public. DefDist distributing the gun plans meant anyone could print gun parts at home in less than an hour.

Wilson’s scheme created a stir in Europe, where gun control law in many countries makes weapon acquisition a deliberately bureaucratic process. However, the Liberator was skating on thin legal ice even in the US, where the Undetectable Firearms Act of 1988 makes it illegal to manufacture a firearm that is not detectable by walk-through metal detectors.

As a workaround, DefDist incorporates a 170g piece of steel into the body of its gun design, making it legal, but who is to say people who download the design to print their own would do the same? It may be argued that the gun’s inability to be detected using metal detectors is negated by the fact it uses a metal firing pin and regular ammunition, and modern airport scanners would detect the shape enclosed in clothing anyhow.

However, all arguments regarding its legal status became moot when, a week after its test firing results were made public, the US Department of State ordered DefDist to remove digital blueprints for the Liberator and to cooperate with an investigation to check whether the files comply with the International Traffic in Arms Regulations (ITAR).

The company complied with the order, and a disclaimer on DefDist's website now reads: "This file has been removed from public access at the request of the US Department of Defense Trade Controls. Until further notice, the United States government claims control of the information."

The order is believed to have come too late as the gun specs had already been downloaded 10,000 times between going online on 6 May and the issuing of the mandate.

DefDist took on pushing the boundaries of firearms law and freedom of information and lost. Plastic guns manufactured using 3D printers are significantly inferior to the real deal, which even those aiming to acquire one for nefarious purposes can get hold of much cheaper and more easily.

For now, the only significant role 3D printers hold in the weapons industry remains creating tangible prototypes for ergonomic testing and functionality trials such as wind-tunnel experiments.

Photograph: Getty Images

Berenice Baker is Defence Editor at Strategic Defence Intelligence.

Photo: Getty
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Will the House of Lords block Brexit?

Process, and a desire to say "I told you so" will be the real battle lines. 

It’s the people versus the peers, at least as far as some overly-excited Brexiteers are concerned. The bill to trigger Article 50 starts its passage through the House of Lords today, and with it, a row about the unelected chamber and how it ought to behave as far as Brexit is concerned.

This week will, largely, be sound and fury. More peers have signed up to speak than since Tony Blair got rid of the bulk of hereditary peers, triggering a 200-peer long queue of parliamentarians there to rage against the dying of the light, before, inevitably, the Commons prevailed over the Lords.

And to be frank, the same is ultimately going to happen with Article 50. From former SDPers, now either Labour peers or Liberal Democrat peers, who risked their careers over Europe, to the last of the impeccably pro-European Conservatives, to committed Labour and Liberal politicians, there are a number of pro-Europeans who will want to make their voices heard before bowing to the inevitable. Others, too, will want to have their “I told you so” on record should it all go belly-up.

The real battle starts next week, when the bill enters committee stage, and it is then that peers will hope to extract concessions from the government, either through defeat in the Lords or the threat of defeat in the Lords. Opposition peers will aim to secure concessions on the process of the talks, rather than to frustrate the exit.

But there are some areas where the government may be forced to give way. The Lords will seek to codify the government’s promise of a vote on the deal and to enshrine greater parliamentary scrutiny of the process, which is hard to argue against, and the government may concede that quarterly statements to the House on the process of Brexit are a price worth paying, and will, in any case, be a concession they end up making further down the line anyway.

But the big prize is the rights of EU citizens already resident here.  The Lords has the advantage of having the overwhelming majority of the public – and the promises of every senior Leaver during the referendum campaign – behind them on that issue. When the unelected chamber faces down the elected, they like to have the weight of public opinion behind them so this is a well-chosen battleground.

But as Alex Barker explains in today’s FT, the rights of citizens aren’t as easy to guarantee as they look. Do pensions count? What about the children of EU citizens? What about access to social security and health? Rights that are easy to protect in the UK are more fraught in Spain, for instance. What about a British expat, working in, say, Italy, married to an Italian, who divorces, but wishes to remain in Italy afterwards? There is general agreement on all sides that the rights of Brits living in the rest of the EU and citizens of the EU27 living here need to be respected and guaranteed. But that even areas of broad agreement are the subject of fraught negotiation shows why those “I told you sos”  may come in handy sooner than we think.

Stephen Bush is special correspondent at the New Statesman. His daily briefing, Morning Call, provides a quick and essential guide to British politics.