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PISTOL
- This article is about small guns. For other uses, see Pistol (disambiguation).
A pistol or handgun is a small firearm intended to be used with one hand.
Overview
All handguns are divided into one of two major groups depending upon the location of the chamber. Revolvers have a revolving chamber; pistols have a chamber integral with the barrel. There are various sub-types.
Some handguns are: single-shot pistols, revolvers, semi-automatic pistols, and fully automatic pistols. In the 15th century the term "pistol" was used for small knives and daggers which could be concealed in a person's clothing. By the 18th century the term came to be used exclusively to refer to hand-held firearms.
The term "pistol" may be derived from the French pistole (or pistolet), which, in turn, comes from the Czech píšťala (flute or pipe, referring to the shape of a Hussite firearm). Other suggestions have been made—that it comes from city of Pistoia, Italy, where perhaps a manufacturer was one Camillio Vettelli in the 1540s; or that early pistols were carried by cavalry in holsters hung from the pommel (or pistallo in medieval French) of a horse's saddle.
Types of handgun
Varieties of handgun: "automatic" self-loading pistols, revolvers including black powder revolvers, multi-barreled pistols, single-shot hunting or target pistols and finally flintlock pistols. In a pistol, the chamber, in which the cartridge is held for firing, is the rearmost portion of the barrel. Thus the term "pistol" technically excludes revolvers, although this distinction is often ignored in colloquial usage, where revolvers are commonly referred to as "pistols."
Flintlock
The flintlock firing mechanism dates back to the 16th century, although it was another hundred years before it was generally used in infantry muskets, by which time it had been perfected. It survived well into the 19th century and was often known as the French lock because Marin le Bourgeoys, a French gunmaker working in Paris for Henry IV's Louvre, had invented it - in about 1610. He had modified a much more complicated mechanism into a simpler one-piece mechanism. It was also called a firelock. The basic action is that the trigger is pulled and a spring causes the striker, the frizzen, to strike the flint which showers sparks on to the gunpowder in the priming pan.
Multi-barreled
Multi-Barreled pistols such as some variants of Derringer and Pepper-box pistols are still in circulation today. The Pepper-box pistol is a multishot handheld firearm, which was popular in North America around the time of the American Civil War. The pepperbox was invented in the 1830s and was meant mainly for civilian use. It spread rapidly in the United Kingdom and some parts of continental Europe. It started disappearing gradually in the 1850s with the manufacture of true revolvers by Colt, Webley and others. It was similar to the revolver since like it, it held bullets in a rotating cylinder, in separate chambers. Unlike the revolver however, each bullet had its own barrel.
Revolvers
Revolvers feed ammunition via the rotation of a cartridge-filled cylinder, in which each cartridge is contained in its own ignition chamber, and is sequentially brought into alignment with the weapon's barrel by a mechanism linked to the weapon's trigger (double-action) or its hammer (single-action). These nominally cylindrical chambers, usually numbering between five and nine depending on the size of the revolver and the size the cartridge being fired, are bored through the cylinder so that their axes are parallel to the cylinder's axis of rotation; thus, as the cylinder rotates, the chambers revolve about the cylinder's axis. Due to simplicity of construction and operation, revolvers are considered to be more reliable than semi-automatic pistols.
Automatic pistols
Automatic pistols continue to fire so long as the trigger is held back. The term automatic pistol is commonly used to refer to an automatic or semi-automatic pistol.
Operating Mechanisms
Single-action (SA) handguns have a trigger mechanism whose sole function is to drop a pre-cocked hammer to discharge a cartridge. For revolvers the popular Colt Peacemaker of Old West fame is typically thought of. Its hammer must be manually cocked for each shot. For auto-loading pistols the Colt 1911 or Browning Hi-Power are typical examples. They must be cocked for the first shot, but subsequent shots are cocked automatically. These types of guns typically have a very light and crisp trigger pull, making for more accurate target shooting.
Traditional double-action (TDA) handguns have a mechanism that can be either pre-cocked, like the above single-action gun, or can be fired with the gun uncocked. In this case, the gun has an additional mechanism added to the trigger that will cock the gun (and rotate the cylinder in the case of revolvers) as the trigger is pulled. Once the trigger is pulled far enough, the hammer is released and the gun fired. For autoloading pistols the self-loading mechanism will also re-cock the hammer after the first shot is fired so that subsequent shots are fired single-action. For revolvers, each shot is fired with the hammer initially uncocked unless the shooter manually cocked the gun. Popular auto pistols in this category include the Walther P38 and Beretta Model 92. These guns typically have a longer, heavier trigger pull for the first shot then light, crisp pulls for subsequent shots. Popular revolvers include the Ruger Redhawk and Smith & Wesson Model 629. These have long, heavy trigger pulls for all shots unless the revolver is manually cocked.
Double-action only (DAO) handguns do not have the ability to be cocked and is usually evidenced by a lack of either the hammer spur or the entire hammer A typical autopistol in this category is the Ruger KP93DAO and Taurus Millennium, and a typical revolver is the Smith & Wesson Model 640 "Chief's Special". All pistols in this category have a long, heavy trigger pull for all shots.
Pre-set triggers are only on autoloading pistols. In this case the pistol mechanism is always partially cocked while being carried and during firing. The partially-cocked firing pin or striker is not cocked enough to cause an accidental release to discharge a cartridge, adding to the safeness of the design, but is cocked enough to remove much of the trigger pull and weight of a purely double-action pistol. These types of pistols do not have external hammers and do not generally have a decock function. Common pistols in the category are the Springfield Armory XD and the various forms of the extremely popular Glock. The trigger pull of these guns is between double-action and single-action pistols. Pre-set triggers may or may not have a second-strike feature on a dud cartridge.
Some automatic pistol models such as the HK Heckler & Koch USP (Universal Self-loading Pistol) come in a variety of mechanism types and can be easily changed by a gunsmith for both left- and right-handed shooters and for different operating mechanism and safety features.
Machine pistols
A machine pistol is generally defined as a firearm designed to be fired with one hand, and capable of fully automatic or selective fire. While there are a number of machine pistols such as the GLOCK 18 and later models of the Mauser C96, these are rare; the light weight, small size, and extremely rapid rates of fire of a machine pistol make them difficult to control, making the larger, heavier submachine gun a better choice in cases where the small size of a machine pistol is required. Most machine pistols have the ability to attach a shoulder stock (the Heckler & Koch VP70 would only fire single rounds unless the stock was attached) while others, such as the Beretta 93R, add a forward handgrip. Either of these additions technically create a legal non-pistol under the US National Firearms Act, as pistols are by definition designed to be fired with one hand. The addition of a stock or forward handgrip is considered a design change that creates either a short-barreled rifle or any other weapon, and therefore such additions are generally only found on legal machine guns.
Advantages of pistols
Pistols are smaller, lighter, easier to conceal, faster to bring to bear, and sometimes may have more safety features than other firearms.
Generally being an emergency self-defense weapon for use under 25 meters, a handgun bullet neither has the energy of, nor the accuracy of, a bullet shot from a rifle.
Pistols and gun politics
Smaller pistols can also be easily concealed on a person—a trait that is particularly useful to people wishing to carry a handgun for self-protection or for criminals wishing to bear arms. Larger handguns, including many hunting pistols, are often much longer and thus less concealable. For these reasons, handguns are a particular focus of debates on gun politics, and in many jurisdictions their ownership is much more heavily regulated than long arms.
Gun rights supporters argue that wide legal ownership of pistols, including the right to carry them concealed, actually deters crime rather than increases it. In the United States, 48 states allow some form of concealed carry by citizens meeting training or other requirements. 39 of these states, called "shall-issue" states, require issue of a permit if there is no compelling reason not to issue a permit (such as a prior felony conviction, a restraining order, or history of mental illness). The remaining 9 states, called "may-issue" states, may deny a permit for any reason, usually at the discretion of local law enforcement. In the United Kingdom, the ownership of almost any pistol has been outlawed since the Dunblane massacre of 1996.
See the main gun politics article or the article on concealed carry in particular for more details on this debate.
Other related info
In the 1780s, Alessandro Volta built a toy electric pistol ([1]) in which an electric spark caused the explosion of a mixture of air and hydrogen, firing a cork from the end of the gun.
See also
A pistol is also the mechanical components of a fuse in a bomb or torpedo responsible for firing the detonator.
External links
Ammunition
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