Gun laws are usually serious business. But every so often a ban gets written for a reason so odd, so based on myth or a single scary news story, that it’s hard not to raise an eyebrow.
These are guns banned for the weirdest reasons, where the rule on the books has more to do with looks, a Hollywood plot, or a clerical accident than with how the gun actually works. We are sticking to the genuinely strange ones, not the big policy fights.
1. The “plastic gun” that never existed
In the 1980s, a panic swept Washington that Glock’s new polymer-framed pistols were invisible “plastic guns” that could slip through airport metal detectors. Die Hard 2 even gave it a name, the “Glock 7,” a porcelain gun that costs more than you make in a month.
Here’s the problem: it doesn’t exist, and it never did. A Glock is roughly 80 percent steel by weight, with a steel slide and barrel that light up any X-ray or detector. Congress passed the Undetectable Firearms Act of 1988 to ban a gun nobody had ever built. The film’s own armorer reportedly tried to talk the producers out of the line.
2. The “cop-killer bullet” that protected gun barrels
In 1982, a television report set off a national fear of Teflon-coated “cop-killer” bullets that could punch through police body armor. A federal ban followed in 1986.
The irony is almost perfect. The Teflon coating did nothing to defeat armor. It was added to keep the hard metal bullet from chewing up the gun’s barrel, and if anything it slightly reduced penetration against Kevlar. The ammunition, known as KTW after its inventors, had been developed as a police round for shooting through car doors, was sold almost entirely to law enforcement, and isn’t known to have ever defeated a vest to kill an officer. The law fixated on the one part of the bullet that did the opposite of what its scary name implied.
3. The barrel-length paradox
Under the National Firearms Act of 1934, a rifle with a barrel shorter than 16 inches, a short-barreled rifle or SBR, is a heavily regulated item, requiring registration and a federal background check. A concealable pistol of the exact same caliber isn’t regulated by that law at all.
How did that happen? The 1934 bill was originally meant to restrict handguns. The short-barrel rules were added to stop people from sawing rifles down into something pocket-sized. Then handguns were dropped from the bill for political reasons, but the short-barrel language was left in. The result is a law where a 15-inch rifle is tightly controlled and a far more concealable pistol walks free.
4. The bayonet lug
The 1994 federal “assault weapon” ban defined a banned rifle partly by its features. One of them was the bayonet lug, the small mounting point where a bayonet attaches.
Drive-by bayonetings were, to put it mildly, essentially nonexistent. Banning the lug did nothing to how the rifle fired. Manufacturers simply shaved it off and kept selling functionally identical guns. One gun-control advocate had openly argued years earlier that these rifles were easier to ban than handguns precisely because their menacing looks scared people. The features on the list were often about appearance, not function.
5. The shotgun that became a “destructive device”
The Street Sweeper and Striker-12 were revolving-cylinder 12-gauge shotguns that could empty all 12 rounds in about three seconds. In 1994, the ATF reclassified them as “destructive devices,” the same legal category as grenades and mortars.
Technically, any 12-gauge has a bore wide enough to count as a destructive device, and only a “sporting purpose” exemption keeps ordinary shotguns out of that bucket. The ATF decided these particular shotguns had no sporting purpose and pulled the exemption. A gun sold over the counter became, overnight and without any new law, a registered destructive device.
6. The cane gun and the $5 loophole
Disguised guns, cane guns, pen guns, wallet guns, fall into a National Firearms Act catch-all called “Any Other Weapon.” For decades, that category carried a strange quirk.
Transferring a factory-made cane gun cost a $5 tax stamp, while a suppressor, a simple hearing-safety device, carried a $200 stamp. For years, a concealed weapon disguised as a walking stick was taxed at one-fortieth the rate of an ear-saving muffler. Stranger still, making your own version cost the full $200. Nobody ever clearly recorded why the disguised-gun tax was set so low.
7. The camping gun saved by three inches
The Marble Game Getter was a humble little folding survival gun from the early 1900s, a combination of a .22 rifle barrel over a .410 shotgun barrel, made to put dinner in a trapper’s pot.
The 1934 law swept it up by barrel length, leaving the 12 and 15-inch versions as regulated weapons to this day. But in 1939, the government issued a ruling that exempted the 18-inch version. So the exact same humble camping gun is a tightly controlled item at 15 inches and an ordinary firearm at 18. Three inches of barrel decides everything.
8. Hearing protection as contraband
The strangest entry might be the suppressor. The 1934 National Firearms Act lumped these noise-reducing devices, which most people still call silencers, in with machine guns and slapped a $200 tax on them, the equivalent of more than $4,000 today during the depths of the Depression.
Meanwhile, in much of Europe and in New Zealand, a suppressor is treated as a basic hearing-safety accessory you can buy cheaply, almost like a muffler for a car. In some hunting cultures, using one is simply considered good manners. The same device is everyday hardware in one country and was regulated like a weapon of war in another. As of 2026, the U.S. transfer tax on suppressors and short-barreled guns has finally dropped to zero, though the registration paperwork remains.
What the guns banned for the weirdest reasons have in common
Look down this list and a pattern jumps out. Again and again, the rule targeted how a gun looked, what it was called, or what a movie said it could do, rather than what it actually did. Fear writes faster than it reads.
That’s what makes these the guns banned for the weirdest reasons. The function barely mattered. The story did. If you like this kind of history, see the Prohibition gangster guns that wrote the first federal gun law and the most famous guns in history.
Keep exploring Cool Guns
- Prohibition Gangster Guns
- The Strangest Military Weapons Ever Built
- 8 Hollywood Gun Myths That Get It Wrong
- 10 Surprising AR-15 Facts
Was there ever a real "plastic gun" that beat metal detectors?
No. The Glock panic of the 1980s was a myth. A Glock is roughly 80 percent steel by weight and shows up clearly on X-rays and metal detectors. The "Glock 7" from Die Hard 2 never existed, and Congress passed a law in 1988 against a gun nobody had ever built.
Why were Teflon "cop-killer" bullets banned?
Out of fear they could pierce police body armor. The irony is that the Teflon coating was there to protect the gun barrel, not to defeat armor, and the ammunition was sold almost entirely to police. The 1986 ban fixated on the one feature that did the opposite of what its name implied.
Why is a short-barreled rifle more regulated than a pistol?
A quirk of the 1934 National Firearms Act. The short-barrel rules were meant to stop people sawing rifles into concealable weapons, but handguns were dropped from the bill for political reasons while the short-barrel language was left in. So a 15-inch rifle is tightly controlled and a more concealable pistol is not.
Why was a bayonet lug a banning feature?
The 1994 assault weapons ban defined banned rifles partly by cosmetic features, including the bayonet lug, even though rifle-bayonet crime is essentially nonexistent. Manufacturers simply removed the lug and kept selling functionally identical rifles.
Are suppressors really regulated like machine guns?
In the US, the 1934 law taxed suppressors as heavily as machine guns, while much of Europe and New Zealand treat them as ordinary hearing-safety accessories. As of 2026 the US transfer tax dropped to zero, though registration and a background check are still required.
14,168+ Gun & Ammo Deals
Updated daily from 10+ top retailers. Filter by category, caliber, action type, and price.