Firearms Information

A firearm is a device which projects either single or multiple projectiles at high velocity through a controlled explosion. The firing occurs by the gases produced through rapid, confined burning of a propellant. This process of rapid burning is technically known as deflagration. In older firearms, this propellant was typically black powder, but modern firearms use smokeless powder, cordite, or other propellants. Most modern firearms have rifled barrels to impart spin to the projectile for improved flight stability.

In the Middle Ages the term "firearm" was used in English to denote the arm in which the match was held that was used to light the touch hole on the hand cannon. The term was a variation on the contemporary terms of bow arm and drawing arm still used in archery. Due to the effects of firing the ordnance at the time, the gunner had to be located somewhat behind the weapon, steadying brace with the other hand, hence the name "hand gun" became synonymous with the "fire arm". Although the modern term 'gun' is often used as a synonym for firearm, in specialist or military use it has a restricted sense referring only to an artillery piece with a relatively high muzzle velocity, such as a field gun, a tank gun, or a gun used in the delivery of naval gunfire. Artillery guns are much larger than these firearms, mounted on a movable carriage, having bores of up to 18 inches and possibly weighing many tons. Strictly speaking, such weapons are not firearms.

Hand-held firearms, like rifles, carbines, pistols and other small firearms are rarely called "guns" in the restricted sense among specialists. Machine guns fire small caliber ammunition , and many machine guns are crew served infantry support weapons, requiring the services of more than one crewman, just like artillery guns. Generally, an automatic firearm designed for a single user is referred to as an automatic rifle. Other terms, including "firearm" itself, have been defined in specialized ad hoc ways by various legislation.

Wikipedia, Firearms, http://en.wikipedia.org/wiki/Firearms (as of Apr 1, 2010)

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