Handgun

• 1. Introduction

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  The handgun is a firearm built around a single constraint: one hand. That defining limitation separates it from every rifle, shotgun, and carbine ever made, and it has shaped six centuries of weapon design, law, and personal identity. The Heilongjiang hand cannon, the oldest known bronze-barrel handgun, dates to 1288 and measures just 34 cm long. From that ancient Chinese weapon to a Glock commanding 65 percent of the United States law enforcement market, the handgun's story is one of radical reinvention inside a remarkably stable idea. How did a device once considered little more than a ceremonial badge of office become the world's most common firearm? What series of mechanical breakthroughs turned a slow, unreliable single-shot tube into a weapon capable of firing seventeen rounds in seconds? And what does it mean that every major government on earth now has a different legal definition of what a handgun actually is?

• 2. Before Mass Production

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  In 1288, a bronze hand cannon was already in use in China's Heilongjiang province. It weighed 3.55 kg and its gunpowder chamber had a diameter of 6.6 cm, noticeably thicker-walled than the barrel to withstand the pressure of ignition. That bulbous, vase-like base became the recognizable silhouette of the earliest handguns, east and west, until improvements in metallurgy made it unnecessary.

  In 1432, the Joseon dynasty under Sejong the Great took a different path. The se-chongtong measured just 13.8 cm in total length and fired a standardized arrow called a chase-jeon to a maximum fatal range of roughly 250 meters. Carried by spies tasked with infiltrating enemy territory, and by soldiers who could swap barrels quickly using its iron tong-handle, it was a weapon designed for concealment and speed rather than power.

  European development ran in parallel. The matchlock appeared in Europe in the mid-15th century and was the first mechanism purpose-built to fire a hand-held gun without requiring a separate flame-holder. A burning slow match was clamped to a curved lever called the serpentine; pulling a trigger dropped the match into a flash pan. The wheellock followed around 1500, spinning a spring-loaded steel wheel against a piece of pyrite to generate sparks, in a mechanism that closely resembles how a cigarette lighter works today. It could be readied and fired with one hand alone, unlike the matchlock, but its complexity made it expensive.

  By the early 17th century the flintlock had arrived and rapidly displaced both earlier technologies. Flintlock pistols ranged in size from under 15 cm to over 51 cm, with specialized forms for every social occasion: coat pistols, coach pistols, belt pistols, and the horse pistol carried in saddle holsters. Before Samuel Colt changed everything, a well-made handgun was closer in status to a ceremonial sword than to a mass-market tool.

• 3. Samuel Colt and the Revolver

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  In 1836, Samuel Colt patented the Colt Paterson, a five-shot revolver initially chambered in .28 caliber. Its revolving cylinder aligned multiple chambers with a single stationary barrel, and its folding trigger remained hidden until the hammer was cocked. The design was genuinely new: a handgun capable of firing five shots in rapid succession without reloading.

  The early Patersons required the user to partially disassemble the gun to reload. By 1839, Colt had incorporated a loading lever and a capping window directly into the design, and he also retrofitted most of the revolvers produced in the preceding three years. The improvement did not stop there. The Colt Walker of 1846 was a six-shot single-action revolver designed in collaboration with Captain Samuel Hamilton Walker, firing a typically .44 caliber lead ball backed by a charge of black powder.

  The Colt 1851 Navy Revolver, designed between 1847 and 1850, brought the revolver to a size suitable for a belt holster rather than a saddle. Its .36 caliber round lead ball weighed 80 grains and at 1,000 feet per second matched the power of a modern .380 pistol cartridge. Colt distributed the Navy across Europe, Asia, and Africa through aggressive promotional campaigns, making the revolver a global commodity.

  The peak of Colt's percussion-era output was the Army Model 1860: a six-shot, .44-caliber weapon accurate to 75-100 yards, manufactured in numbers exceeding 200,000 between 1860 and 1873. The U.S. Government alone purchased more than 129,730 units. Its muzzle velocity of about 900 feet per second was produced by a 30-grain charge of black powder ignited by a small copper percussion cap containing fulminate of mercury, a compound that explodes on sharp impact. It became the most widely used revolver of the Civil War.

• 4. The Percussion Cap and Its Inventor

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  The caplock mechanism that powered Colt's revolvers traced its origins to a frustrated bird hunter. Reverend Alexander John Forsyth had noticed that birds flushed from cover the instant smoke puffed from the powder pan of his flintlock shotgun, giving them enough warning to escape the shot. His answer was a fulminate-primed firing mechanism that removed that telltale puff entirely and shortened the gap between trigger pull and projectile.

  Forsyth patented his ignition system in 1807. Crucially, the conventional percussion cap that would go on to define the era was not developed until after his patents expired; those patents effectively held the technology in suspension during the critical years of their protection.

  The percussion cap itself is chemically precise: a small charge of mercury fulminate, with the formula Hg(ONC), made from mercury, nitric acid, and alcohol. Struck by the hammer, the compound explodes. Flames travel down a tube in the nipple, enter the barrel, and ignite the main powder charge. The result was a mechanism easier to load, far more resistant to weather, and substantially more reliable than the flintlock it replaced. So many existing flintlock weapons were eventually converted to caplocks that the older technology effectively disappeared from service.

• 5. The Metallic Cartridge Revolution

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  Smith & Wesson's Model 1, produced from 1857 through 1882, was the first commercially successful revolver to abandon loose powder and percussion caps entirely. It held seven .22 Short black powder cartridges in a self-contained metallic rimfire format. The question of how to unload a revolver quickly had not been settled, and Smith & Wesson approached it differently than Colt.

  The firm's Model 3, produced from around 1870 to 1915, used a top-break action that automatically ejected all spent shells when the frame was hinged open. It was chambered across a wide range of calibers including .44 American, .44 Russian, .44 Henry Rimfire, .44-40, and .45 Schofield. Colt took a different structural approach with the Single Action Army, adopted as the U.S. military service revolver in 1873. Known as the Peacemaker, it offered over 30 calibers and various barrel lengths from a rigid frame that loaded one round at a time through a side-mounted gate. Its appearance has remained consistent since 1873, and Colt has discontinued and revived it twice due to sustained collector demand.

  The swing-out cylinder, introduced by Colt in 1889 with the Model 1889, merged the best features of both approaches: simultaneous ejection from a rigid frame. Smith & Wesson followed with the Hand Ejector, Model 1896, and then the Model 1899, which introduced the .38 Special cartridge. The Model 10, the evolved form of that 1899 design, became the best-selling handgun of the 20th century at 6,000,000 units. The .38 Special remains the most popular chambering for revolvers in the world.

  By 1935, handloaders experimenting with smokeless powder in older black-powder cases pushed the ballistics far beyond what the original cartridge designers had imagined. Smith & Wesson released the Registered Magnum that year, the first revolver chambered for .357 Magnum, aimed at law enforcement officers who needed more power. Twenty years later, in 1955, the Smith & Wesson Model 29 in .44 Magnum arrived. Two decades after that, the Dirty Harry films turned it into a cultural icon.

• 6. Derringers and Pocket Pistols

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  Henry Deringer introduced the original Philadelphia Deringer in 1852: a single-shot, muzzle-loading percussion cap pistol typically in .41 caliber with a rifled bore and a walnut stock. Barrel length ran from 1 inch to 6 inches, hardware was commonly German silver, and total production across all variants reached approximately 15,000 pistols. The name itself became generic through widespread misspelling, so that "derringer" with two r's came to describe any small pocket pistol, regardless of maker.

  Daniel Moore patented a single-shot metallic cartridge .38 rimfire derringer in 1861, with a barrel that pivoted sideways to access the breech. He manufactured it until 1865, sold out to National Arms Company, which produced the design until 1870, at which point Colt acquired the firm. Colt continued producing .41 Rimfire derringers under the original concept and introduced three of its own single-shot Derringer models, all in the same cartridge. The third of those models stayed in production until 1912 and was re-released in the 1950s for western films under the name Fourth Model Colt Deringer.

  The design that overtook all predecessors was the Remington Model 95: an over-under, double-barreled derringer in .41 Rimfire, manufactured from 1866 until 1935, with total production exceeding 150,000 units. Its barrels pivoted upward to reload and a cam on the hammer alternated between top and bottom firing positions. The .41 Rimfire bullet traveled at roughly 425 feet per second, about half the speed of a modern .45 ACP round, and could actually be seen in flight. At the close distances of a card table or saloon, that was still lethal. The Remington design is still being made, now in calibers from .22 long rifle to .45 Long Colt and .410 gauge, and the current production serves both Cowboy Action Shooters and concealed-carry users.

• 7. The Semi-Automatic Age

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  Paul Mauser introduced the C96 in 1896, the first mass-produced commercially successful semi-automatic pistol. It harnessed the recoil energy of each fired round to load the next, held ten rounds in an integral box magazine mounted ahead of the trigger, and came with a wooden stock that doubled as a holster. That round wooden grip earned it the nickname "broomhandle" across the English-speaking world.

  Georg Luger patented an improvement on the earlier Borchardt Automatic Pistol that became the Parabellum, one of the first semi-automatic pistols to house its detachable magazine inside the grip. The Swiss army adopted it in May 1900. The German military followed, standardizing on the Pistol Model 1908 in 9x19mm Parabellum. Production of various national versions ran from 1898 to 1948.

  John Browning's Colt Model 1911 served as the standard-issue sidearm of the United States Armed Forces from 1911 to 1986. Chambered for .45 ACP with a 7+1-round capacity, its short recoil operating system became the template for nearly all modern centerfire pistols. Browning died in 1926, but his influence extended to the Browning Hi-Power, completed by Dieudonné Saive at Fabrique Nationale in Belgium and introduced in 1935. The Hi-Power held 13 rounds, almost twice the capacity of the Luger or M1911, and went on to serve the armed forces of more than 50 countries.

  The Heckler and Koch VP70, introduced in 1970, brought together innovations that would define the next generation: a polymer frame, a high-capacity 18-round magazine, and a spring-loaded striker. Its polymer construction predated the Glock by twelve years, though market skepticism about plastic guns delayed wider acceptance of the concept. That skepticism had largely faded by 1982, when the Glock 17 entered Austrian military and police service after outperforming all rivals in reliability and safety testing. Despite early fears that airport metal detectors would miss its polymer frame, the Glock went on to capture 65 percent of the U.S. law enforcement handgun market and serve police and military forces in at least 48 countries. The Beretta 92, introduced in 1975 and adopted by the U.S. military as the M9 in 1985 to replace the M1911A1, contributed its own lasting innovation: a magazine with direct feed requiring no feed ramp between the magazine and the chamber, a design first tested on its 1974 predecessor, the .380 caliber Model 84.

• 8. Definition and Law

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  No two governments define a handgun in exactly the same terms. The American Bureau of Alcohol, Tobacco, Firearms and Explosives does not provide a single legal definition of the word "handgun" but does separately define "handgun - pistol" and "handgun - revolver" under its Terminology and Nomenclature section, both described as a weapon designed to fire a projectile from one or more barrels when held in one hand. The U.K. government similarly offers no specific statutory definition.

  Canada's Criminal Code takes a broader approach, covering any firearm designed to be aimed and fired by the action of one hand, even if it has subsequently been altered to require two. Australia's National Firearms Agreement, enforced independently by each state and territory, defines a handgun through three alternative physical tests: whether it is reasonably capable of being carried or concealed on a person, whether it can be raised and fired one-handed, or whether it does not exceed 65 cm in total length measured parallel to the barrel.

  The FN Five-seveN, introduced in 1998 and currently in service with military and police forces in over 40 nations including the U.S. Secret Service, illustrates why those legal definitions keep evolving. It fires a cartridge capable of penetrating body armor with certain ammunition types, a capability that forces regulators to revisit the boundary between personal defense weapon and something more. Meanwhile, 3D-printed firearms add another layer of complexity: handguns that can be produced without a serial number, a manufacturer, or a supply chain, by anyone with access to the right hardware.