A firearm is device, typically used as a weapon, which fires projectile(s) with the force of the expanding gases created by the rapid burning of a confined propellant (typically gunpowder). Such weapons can be as small as handguns, which can be carried and used in one hand, or as large as the cannon on a battleship.
Such weapons are typically referred to as "guns" in common usage. Gun has a particular meaning in specialist usage, however, when referring to larger weapons; a gun is a direct-fire weapon (which fires directly at the target), whereas a howitzer or mortar is an indirect-fire weapon (a weapon that fires in a high arc to drop its fire down on a target).
see also Naval guns
- Home security/defense and the Castle Doctrine
- Self-defense: Firearms (Rifle, Handgun, Shotgun), Knife,Taser, Weapons
- Bug-out bag
- Constitutional carry
- Gun control
- List of celebrities against Second Amendment
- National Firearms Act of 1934
- Gun Control Act of 1968
- Brady Handgun Violence Prevention Act of 1994
- List of instances of armed citizens stopping active shooters