Firearm

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The M16 rifle and the AK-47, two common firearms with significant influences on firearm design

A firearm is any type of gun that uses an explosive charge and is designed to be readily carried and used by an individual.[1][2][3] The term is legally defined further in different countries (see Legal definitions).

The first firearms originated in 10th-century

pellet projectiles were mounted on spears to make the portable fire lance,[4] operable by a single person, which was later used effectively as a shock weapon in the siege of De'an in 1132. In the 13th century, fire lance barrels were replaced with metal tubes and transformed into the metal-barreled hand cannon.[5] The technology gradually spread throughout Eurasia during the 14th century. Older firearms typically used black powder as a propellant, but modern firearms use smokeless powder or other propellants. Most modern firearms (with the notable exception of smoothbore shotguns) have rifled barrels to impart spin to the projectile
for improved flight stability.

Modern firearms can be described by their

percussion lock), to the design's primary intended use (e.g. hunting rifle), or to the commonly accepted name for a particular variation (e.g. Gatling gun
).

Shooters aim firearms at their targets with

hand-eye coordination, using either iron sights or optical sights. The accurate range of pistols generally does not exceed 100 metres (110 yd; 330 ft), while most rifles are accurate to 500 metres (550 yd; 1,600 ft) using iron sights, or to longer ranges whilst using optical sights. (Firearm rounds may be dangerous or lethal well beyond their accurate range; the minimum distance for safety is much greater than the specified range for accuracy). Purpose-built sniper rifles and anti-materiel rifles
are accurate to ranges of more than 2,000 metres (2,200 yd).

Types