A handgun is a firearm designed to be usable with only one hand. It is distinguished from a long gun (i.e., carbine, rifle, shotgun, submachine gun, or machine gun) which typically is intended to be held by both hands and braced against the shoulder. Handguns have shorter effective ranges compared to long guns, lack stocks, and are much harder to shoot accurately. While most early handguns were single-shot pistols, following the mass production of the Colt Paterson revolver starting in 1836, most handguns today are revolvers and semi-automatic pistols.George Nonte's COMBAT HANDGUNS, edited by Edward Ezell. Stackpole Books, 1980, 2nd printing 1981.
Before commercial mass production, handguns were often considered a badge of office comparable to a ceremonial sword, as they had limited utility and were more expensive than the long barreled guns of the era. In 1836, Samuel Colt patented the Colt Paterson, the first practical mass-produced revolver, which was capable of firing five shots in rapid succession and quickly became a popular personal weapon. Handguns became defined as a weapon meant for personal defence. They are used today mostly as sidearms by law enforcement.
Definition The Encyclopædia Britannica defines a handgun as "any firearm small enough to be held in one hand when fired"; while the American Webster's Dictionary defines it as "a firearm (such as a revolver or pistol) designed to be held and fired with one hand".
Among the Anglophone countries, neither the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), which is part of the United States Department of Justice or the Government of the United Kingdom, who are in charge of American and British firearms licensing respectively, offer any specific legal definitions of a handgun. The ATF, however, does separately define "handgun – pistol" and "handgun – revolver" under its "Terminology & Nomenclature" section, both with the "pistol-type" description of "a weapon originally designed, made, and intended to fire a projectile (bullet) from one or more barrels when held in one hand".
The Canadian Criminal Code defines a handgun as "a firearm that is designed, altered or intended to be aimed and fired by the action of one hand, whether or not it has been redesigned or subsequently altered to be aimed and fired by the action of both hands".
The Australian gun laws, which are based on the National Firearms Agreement (1996) and interpreted and enforced independently by each state or territory, consider a "handgun" a firearm that:
History
Hand cannons
Firearms started in China where gunpowder was first developed. The oldest known bronze barrel handgun is the Heilongjiang hand cannon in 1288. It is 34 cm (13.4 inches) long without a handle and weighs 3.55 kg (7.83 pounds). The diameter of the powder chamber is 6.6 cm (2.6 inches) while the diameter of the interior at the end of the barrel is 2.5 cm (1.0 inch). The barrel is the lengthiest part of the hand cannon at 6.9 inches long.
The hand cannon has a bulbous base at the breech called the Yoshi (), or gunpowder chamber, where the explosion that propels the projectile occurs. The walls of the powder chamber are noticeably thicker to better withstand the explosive pressure of the gunpowder. The powder chamber also has a touch hole, a small hole for the fuse that ignites the gunpowder. Behind the gunpowder chamber is a socket shaped like a trumpet where the handle of the hand cannon is inserted. The bulbous shape of the base gave the earliest Chinese and Western cannons a vase-like or pear-like appearance, which gradually disappeared when advancements in metallurgical technology made the bulbous base obsolete.
In 1432, Joseon dynasty under the reign of Sejong the Great introduced the world's first handgun named se-chongtong (세총통). Se-chongtong has a total length of 13.8 cm, an inner diameter of 0.9 cm, and an outer diameter of 1.4 cm. Se-chongtong is held by cheolheumja (철흠자, iron tong-handle), which allows quick change barrel for the next shot, and fires chase-jeon (차세전, a type of standardized arrow of Joseon) with a maximum fatal range of 200 footsteps (≈250 meters). Initially, Joseon considered the gun as a failed project due to its short effective range, but se-chongtong quickly saw usage after fielding to the frontier provinces starting in June 1437. Se-chongtong was used by both soldiers of different units and civilians, including women and children, as a personal defense weapon. The gun was notably used by chetamja (체탐자) spies, whose mission was to infiltrate enemy territory, and by carabiniers carrying multiple guns benefited from its compact size.
Matchlocks
The matchlock appeared in Europe in the mid-15th century. The matchlock was the first mechanism invented to facilitate the firing of a hand-held firearm. The classic European matchlock gun held a burning slow match in a clamp at the end of a small curved lever known as the serpentine. Upon the pulling of a lever (or in later models a trigger) protruding from the bottom of the gun and connected to the serpentine, the clamp dropped down, lowering the smoldering match into the flash pan and igniting the priming powder. The flash from the primer traveled through the touch hole igniting the main charge of propellant in the gun barrel.
On the release of the lever or trigger, the spring-loaded serpentine would move in reverse to clear the pan. For obvious safety reasons, the match would be removed before reloading the gun. Both ends of the match were usually kept alight in case one end should be accidentally extinguished.
Wheellocks
The wheellock was the next major development in firearms technology after the matchlock and the first self-igniting firearm. Its name comes from the rotating steel wheel which generates the ignition. Developed in Europe around 1500, it was used alongside the matchlock.
The wheellock works by spinning a spring-loaded steel wheel against a piece of pyrite to generate intense sparks, which ignite gunpowder in a pan, which flashes through a small touchhole to ignite the main charge in the firearm's barrel. The pyrite is clamped in vise jaws on a spring-loaded arm (or "dog"), which rests on the pan cover. When the trigger is pulled, the pan cover is opened, and the wheel is rotated, with the pyrite pressed into contact.
A close modern analogy of the wheellock mechanism is the operation of a cigarette lighter, where a toothed steel wheel is spun in contact with a piece of sparking material to ignite the liquid or gaseous fuel.
A wheellock firearm had the advantage that it could be instantly readied and fired even with one hand, in contrast to the then-common matchlock firearms, which required an operator to prepare a burning cord of slow match and demanded the operator's full attention and two hands to operate. On the other hand, wheellock mechanisms were complex to make, making them relatively expensive.
Flintlocks
A flintlock is a general term for any firearm that uses a flint-striking ignition mechanism. The term may also apply to a particular form of the mechanism itself, which was introduced in the early 17th century, and rapidly replaced earlier firearm-ignition technologies.
Flintlock pistols were used as self-defense weapons and as military arm. Their effective range was short, and they were frequently used as an adjunct to a sword or cutlass. These pistols were usually smoothbore although some rifled pistols were produced.
Flintlock pistols came in a variety of sizes and styles which often overlap and are not well defined; many of the names used were applied by collectors and dealers long after the pistols were obsolete. The smallest were less than 15 cm (5.9 inches) long and the largest were over 51 cm (20 inches). From around the beginning of the 1700s the larger pistols got shorter so that by the late 1700s the largest were closer to 41 cm (16 inches) long. The smallest would fit into a typical pocket or a hand-warming muff and could easily be carried.
The largest sizes would be carried in holsters across a horse's back just ahead of the saddle. In-between sizes included the coat pocket pistol, or coat pistol, which would fit into a large pocket, coach pistols, meant to be carried on or under the seat of a coach in a bag or box, and belt pistols, sometimes equipped with a hook designed to slip over a belt or waistband. Larger pistols were called horse pistols.
A notable mechanical development of the flintlock pistol was the English duelling pistol; it was highly reliable, water resistant, and accurate. External decoration was typically minimal but the internal works were often finished to a higher degree of craftsmanship than the exterior. Duelling pistols were the size of the horse pistols of the late 1700s, around 41 cm (16 inches) long and were usually sold in pairs along with accessories in a wooden case with compartments for each piece.
Caplocks
The caplock mechanism or percussion lock was developed in the early 19th century and used a percussion cap struck by the hammer to set off the main charge, rather than using a piece of flint to strike a steel frizzen. They succeeded the flintlock mechanism in firearm technology.
The rudimentary percussion system was developed by Reverend Alexander John Forsyth as a solution to the problem that birds would startle when smoke puffed from the powder pan of his flintlock shotgun, giving them sufficient warning to escape the shot.
His invention of a fulminate-primed firing mechanism deprived the birds of their early warning system, both by avoiding the initial puff of smoke from the flintlock powder pan, as well as shortening the interval between the trigger pull and the shot leaving the muzzle. Forsyth patented his ignition system in 1807. However, it was not until after Forsyth's patents expired that the conventional percussion cap system was developed.
The caplock offered many improvements over the flintlock. The caplock was easier to load, more resistant to weather, and was much more reliable than the flintlock. Many older flintlock weapons were later converted into caplocks so that they could take advantage of this increased reliability.
The caplock mechanism consists of a hammer, similar to the hammer used in a flintlock, and a nipple (sometimes referred to as a "cone"), which holds a small percussion cap. The nipple contains a tube that goes into the barrel. The percussion cap contains a chemical compound called mercury fulminate or fulminate of mercury, the chemical formula of which is Hg(ONC). It is made from mercury, nitric acid, and alcohol. When the trigger releases the hammer, it strikes the cap, causing the mercuric fulminate to explode. The flames from this explosion travel down the tube in the nipple and enter the barrel, where they ignite the main powder charge.
Revolvers
Percussion era
In 1836, Samuel Colt patented the Colt Paterson, the first practical mass-produced revolver. It uses a revolving cylinder with multiple chambers aligned with a single, stationary barrel. Initially, this 5-shot revolver was produced in .28 caliber, with a .36 caliber model following a year later. As originally designed and produced, no loading lever was included with the revolver; a user had to partially disassemble the revolver to re-load it. Starting in 1839, a reloading lever and a capping window were incorporated into the design, allowing reloading without requiring partial disassembly of the revolver. This loading lever and capping window design change was also incorporated into most Colt Paterson revolvers that had been produced from 1836 until 1839. Unlike later revolvers, a folding trigger was incorporated into the Colt Paterson. The trigger only became visible upon cocking the hammer.