Like HowStuffWorks on Facebook!

Science | Military | Firearms

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.

Featured
10 Hallmarks of Assault Weapons — and What They Do

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.