The "Porcelain Glock" Myth: How Die Hard 2 Fooled a Generation

The line everyone remembers

If you worked a gun counter in the 1990s, you heard some version of it weekly. A customer would point at a Glock and ask, half joking, whether it was the one that gets through airport metal detectors. Some of them were not joking.

The source of that question is easy to trace. Die Hard 2, directed by Renny Harlin and released in the United States on July 4, 1990, is set at Washington Dulles International Airport during a terrorist takeover. In it, Bruce Willis's John McClane warns about a "Glock 7," described as a porcelain pistol that airport security cannot detect. Every part of that is wrong. There is no Glock 7, and no Glock has ever been made of porcelain.

But the line landed because it sounded like something viewers had already half heard on the news. For that, you have to go back about five years before the movie.

A "plastic pistol" arrives

Glock's first pistol was adopted by the Austrian military and police in 1982 as the Pistole 80, and sold as the Glock 17. Its frame, magazine body and several smaller parts were made from a nylon-based polymer that Gaston Glock developed, which the company calls Polymer 2. To shooters used to all-steel and aluminum-framed service pistols, it looked radical.

When Glock tried to bring the pistol to the United States, the first guns shipped in 1985 did not meet the federal import requirements of the time. After a sight change, the pistol was imported and sold commercially in 1986. The phrase "plastic gun" did the rest.

The fear was simple and understandable: if a handgun were made mostly of plastic, perhaps it could defeat the walk-through metal detectors and X-ray machines that airport security relied on. Glock pistols became the face of that concern, whether or not the concern fit the actual gun.

What a Glock is actually made of

Pick up any Glock and the answer is obvious once you know where to look. The polymer frame is the big black part you hold. Everything that contains the pressure of firing, and much of what makes the pistol work, is metal.

As a reference summary of the Glock company history puts it, early fears that the pistol would be invisible to airport X-ray machines were unfounded, because the majority of the gun's weight comes from steel components and the polymer is visible to X-ray. In other words, a Glock on an X-ray screen looks like what it is: a handgun.

The "porcelain" part of the myth has no basis at all. Ceramic is a poor material for a pressure-bearing gun part, and no mass-produced service pistol has used it for a frame, slide or barrel.

The law that followed

The scare still produced real legislation. In the mid-1980s, lawmakers proposed bans on handguns with less than a set amount of steel; one early proposal used an 8-ounce threshold, which the NRA opposed. The compromise became the Undetectable Firearms Act, which President Ronald Reagan signed on November 10, 1988. It took effect December 9, 1988.

The law makes it illegal to manufacture, import, sell, possess, transfer or receive a firearm that is not as detectable by walk-through metal detection as a "security exemplar" containing 3.7 ounces of steel, or one whose major components do not generate an accurate image before standard airport imaging technology. According to the legislative history summarized on Wikipedia, the compromise standard was set well below the Glock's own metal content, which is why the Glock never ran afoul of it.

The act was written with a sunset date and has been renewed repeatedly: for five years in 1998, ten years in 2003, ten more in 2013, and in 2024 it was extended until March 8, 2031.

Why the myth stuck

The movie did not invent the fear; it gave it a brand name. A few things made the "porcelain Glock" unusually sticky:

• It was half true. Glock frames really are polymer, and that was genuinely new to most people in 1986. A myth with a true detail attached is harder to dismiss.
• It came with a law. People heard that Congress had passed an act about undetectable guns and assumed the guns must have existed.
• It came from a hero. McClane was the cop who knew things. Audiences took the line as insider knowledge.
• Few people had held one. In 1990, many Americans had never handled any pistol, let alone a polymer one.

The irony is that, over the years that followed, Glocks became one of the most familiar police service pistols in the country. The same "plastic gun" people feared ended up riding on the hips of the officers they trusted.

What the Glock became instead

The real story is far more ordinary and far more influential. The polymer frame turned out to be light, durable, corrosion-resistant and cheap to produce, and nearly every major maker followed with polymer-framed striker pistols of their own. The Glock 17 and its smaller sibling, the Glock 19, became default choices for agencies, and the FBI awarded Glock a 9mm contract in 2016.

If you want a modern version of the gun that started it all, Ammunition Depot lists the Glock 17 Gen5 and the more compact Glock 19 Gen5. Neither will get you past a checkpoint, which is exactly as it should be. Check the listing details, because some configurations ship with 10-round magazines.

Our Glock police history covers how the pistol went from an Austrian army tender to America's most familiar duty gun.

Flying with a real Glock

The practical opposite of the myth: if you travel by air with a handgun, it goes through the declared, checked-baggage process that TSA and your airline publish, never through a checkpoint. Officers flying armed follow separate federal procedures arranged through their agency.

Rules change and airlines add their own, so check TSA's current guidance and your airline before every trip. And check the laws at your destination, which may be very different from home.

Myth vs fact, quickly

• Myth: Glock made a porcelain pistol. Fact: No such pistol has existed. The "Glock 7" is fictional.
• Myth: Glocks do not show up on airport X-rays. Fact: The steel slide, barrel and internal parts show up, and the polymer is visible on X-ray too.
• Myth: The Glock was a niche or exotic gun. Fact: It was adopted by Austria's military and police in 1982 and later by the FBI under a 2016 9mm contract.
• Myth: The Undetectable Firearms Act banned the Glock. Fact: The act set a detectability standard the Glock already met.

Editorial note: This is an independent editorial overview built from manufacturer specifications, retailer listings and published sources. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and the law where you live.

Affiliate disclosure: Some links on this page are affiliate links to Ammunition Depot. We may earn a commission if you buy through them, at no extra cost to you. Our editorial choices are not influenced by commissions. Check current price, stock and specifications directly with the retailer.