Firearms are one of the oldest and most evolved weapon systems. From flintlocks to automatic weapons and flamethrowers, learn how firearms have been used to wage wars and save lives.
Recovered 'Lost Squadron' Plane Leads to New Mystery
What does an Army combat engineer do?
Why Nerve Agent Novichok Is So Deadly
Why Smoking Rates in the Military Are So High
Trinitite: How the First Nuclear Bomb Turned Sand to Glass
What Are 'Low-yield' Nuclear Weapons?
How the Navy Ship Comfort Is Aiding Puerto Rico
10 Financial Tips for Preparing for Deployment
If Torture Doesn't Work, Why Do Governments Use It?
Does the U.S. Military Maintain Secret Underwater Bases?
Do we still need nuclear submarines?
All six countries are in the Americas.
By Dave Roos Sep 17, 2018
The debate over the legality of 3D-printable guns rages on, but how big an issue will they turn out to be?
By Jerad W. Alexander Aug 3, 2018
The ArmaLite AR-15 rifle has become a hot-button issue in the American landscape. Where did the rifle originate and how did it become so controversial?
By Jerad W. Alexander Aug 1, 2018
Self-defense is a hallmark of the Second Amendment to the U.S. Constitution. But could self-defense insurance policies embolden a gun owner to shoot?
By John Donovan Dec 1, 2017
HowStuffWorks explains two ways that gun owners are modifying their semi-automatic weapons to fire like automatic ones.
Bump fire stocks enable a shooter like Las Vegas killer Steven Paddock to fire a semi-automatic rifle at nearly the rate of an automatic. How do they work?
By Patrick J. Kiger Oct 5, 2017
A new study shows gun sales in the U.S. for self-defense soars, while sales for recreational shooting and hunting languish.
By Alia Hoyt Jul 5, 2017
Would populations boom and violence cease? Or would humans and human nature essentially remain the same?
By Christian Sager Jan 19, 2017
For instance, gun silencers don't make guns all that quiet.
By Dave Roos Jan 12, 2017
Firearms get the historical spotlight, but what about the projectiles they hurl at insane speeds? Here are the innovations that gave rise to modern ammunition. Think of it as 10 rounds of ammo info.
By William Harris
High-profile shootings often make people wonder if the victim or victims would still be alive if no guns had been available. But is that true? Are people more reckless simply because they have a gun?
By Becky Striepe
Do you know which features earn an ordinary firearm the "assault" label in the U.S.? There's more to that definition than just semi-automatic action.
The term "semi-automatic weapon" is used in the U.S. media often. But what does it really mean? Is it just another term for a machine gun?
By Chris Opfer
Guns come in all shapes and sizes. Put on your safety gear and take a look at this gallery of revolvers, Glocks, shotguns and even flamethrowers.
By Rick Mayda
Whether they're antique rifles or modern handguns and shotguns, firearms are popular in the United States. So which pieces are people packing?
Sure, G.I. Joe's accoutrements are tiny, but this itty bitty gun actually fires rounds. What is it, and why is it illegal to import into the United States?
By Josh Clark
To do its job, a projectile must both make contact with the target and hit the target in a critical spot. If a rifle is like using a felt-tip pen, a shotgun is like using a can of spray paint.
By Dave Coustan
Guns permeate society -- police officers carry them, wars are fought with them, normal citizens own them. These articles will show you how different types of guns function from trigger to barrel.
By Marshall Brain
The revolver turned shooting a round into a one-step process, forever changing the face of crime, law enforcement and self-defense. Find out what goes on inside a revolver.
By Tom Harris
When humans discovered fire, they learned to cook their food in a controlled environment. What came next? Flamethrowers, of course. What do flamethrowers have in common with their living counterpart -- fire breathers?
The invention of the machine gun forever changed the battlefield. While soldiers once had to reload after a single shot, they now can fire hundreds of rounds per minute without a single pause.
By Stephanie Watson & Tom Harris
If you could build a train that could travel as fast as a bullet, what would happen if you fired a gun from the back of the train ... or from the front of the train?
How in the world can a gun silencer work? How can you possibly take an explosive noise that can damage your hearing and turn it into a little "ffft" sound?
If you've ever watched a gun fired into the air at a celebration, you've probably wondered where that bullet ends up. We've got the answer.
Flintlock guns were extremely important weapons in the American Revolution; they also formed the foundation of all modern guns. Learn about the gun that started it all.
What Is Einstein's 'God Letter'?
If the Light Is Stuck on Red, Are You Stuck Too?
Rare Groundcherry Could Soon Be Everywhere, Thanks to Gene Editing