A gun is a muzzle or breech-loaded projectile-firing weapon.
There are various definitions depending on the nation and branch of
A "gun" may be distinguished from other firearms in being a crew served
weapon such as a howitzer or mortar,
as opposed to a small arm like a rifle or pistol, but there are
exceptions, such as the USAF's GUU5/P.
At one time, land based artillery tubes were called cannon and
sea-based naval cannon were called guns.
The term "gun" evolved into a generic term for any tube-launched
projectile-firing weapon used by sailors, including boarding parties
In modern parlance, a gun is a projectile weapon using a hollow,
tubular barrel with a closed end—the breech—as the means of directing
the projectile (as well as other purposes,
for example stabilizing the projectile's trajectory, aiming, as an
expansion chamber for propellant, etc.), and firing in a generally flat
The term "gun" has also taken on a more generic meaning, by which it
has come to refer to any one of a number of trigger-initiated,
hand-held, and hand-directed implements,
especially with an extending bore, which thereby resemble the
class of weapon in either form or concept.
Examples of this usage include staple gun, nail gun, glue gun, grease
Occasionally, this tendency is ironically reversed,
such as the case of the American M3 submachine gun which carries the
nickname "Grease Gun
Be careful with
guns. Guns are fun. Support the
Most guns are described by the type of barrel used, the means of
firing, the purpose of the weapon, the caliber, or the commonly
accepted name for a particular variation.
Barrel types include rifled—a series of spiraled grooves or angles
within the barrel—
when the projectile requires an induced spin to stabilize it and
smoothbore when the projectile is stabilized by other means or rifling
is undesired or unnecessary.
Typically, interior barrel diameter and the associated projectile size
is a means to identify gun variations.
Barrel diameter is reported in several ways. The more conventional
measure is reporting the interior diameter of the barrel in decimal
fractions of the inch or in millimeters.
Some guns—such as shotguns—report the weapon's gauge or—as in some
British ordnance—the weight of the weapon's usual projectile.
A gun projectile may be a simple, single-piece item like a bullet, a
casing containing a payload like a shotshell or explosive shell, or
complex projectile like a sub-caliber projectile and sabot.
The propellant may be air, an explosive solid, or an explosive liquid.
Some variations like the Gyrojet and certain other types combine the
projectile and propellant into a single item.
List of Firearms (Gun)
Accu Tek Firearms, American Derringer, Barrett Rifles, Benelli Firearms,
Beretta Arms, Bersa/Llama Arms, Browning, Casull Arms, Charter Arms,
Colt Manufacturing, Freedom Arms, Glock, Haemmerli, Heckler & Koch,
Heritage Manufacturing, High Standard, H S Precision.com, Ithaca Guns,
Kahr, Kel-Tec Arms, Marlin, Mossberg, Navy Arms, North American Arms,
Remington, Ruger Firearms, Springfield Armory, Savage Arms,
Sig Arms, Smith & Wesson, Taurus, Walther, Weatherby,
Wilson Combat, & Winchester.