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A revolver is a repeating firearm that has a revolving cylinder containing multiple chambers and at least one barrel for firing. The term "revolver" refers to a handgun, but other weapons may also have a revolving chamber. These include some models of grenade launchers, shotguns, and rifles.
Though the original name was "revolving gun", the short-form "revolver" is universally used. Nearly all revolvers have six chambers in the cylinder, giving rise to the slang term "six-shooter"; however, revolvers with from four to twelve chambers have been made.
The revolver allows the user to fire multiple rounds without reloading. Each time the user cocks the hammer, the cylinder revolves to align the next chamber and round with the hammer and barrel, which gives this type of firearm its name. In a single-action revolver, the user pulls the hammer back with his free hand or thumb; the trigger pull only releases the hammer. In a double-action revolver, pulling the trigger moves the hammer back, then releases it.
The first true revolver—a flintlock—was made by Elisha Collier in 1814. The first percussion cap revolver was the Colt Paterson, invented by Samuel Colt in 1836. The first cartridge revolvers were produced around 1856 by Smith & Wesson.
Revolver handguns soon became standard for nearly all uses. In the early 20th century, semi-automatic pistols were developed, which can hold more rounds, and are faster to reload. "Automatic" pistols also have a flat profile, more suitable for concealed carry.
Thus automatic pistols have largely replaced revolvers in military and law enforcement use (in military use, from 1910-1960; in law enforcement, in the 1980s and 1990s).
Revolvers still remain popular as back-up and off-duty guns among American law enforcement officers and security guards. Also, revolvers are still common in the American private sector as defensive and sporting/hunting firearms. Famous police and military revolvers include the Webley, the Colt Single Action Army, the Colt Police Special, the Smith & Wesson Model 29, the Smith & Wesson Model 10, the Smith & Wesson 1917 and the Nagant M1895.
A revolver works by having several firing chambers arranged in a circle in a cylindrical block that are brought into alignment with the firing mechanism and barrel one at a time. In contrast, other repeating firearms, such as lever-action, pump-action, and semi-automatic, have a single firing chamber and a mechanism to load and extract cartridges into it.
A single-action revolver requires the hammer to be pulled back by hand before each shot, which also revolves the cylinder. This leaves the trigger with just one "single action" left to perform - releasing the hammer to fire the shot - so the force and distance required to pull the trigger can be minimal. In contrast, with a self-cocking revolver, one long squeeze of the trigger pulls back the hammer and revolves the cylinder, then finally fires the shot. They can generally be fired faster than a single-action, but with reduced accuracy in the hands of most shooters.
Most modern revolvers are "traditional double-action", which means they may operate either in single-action or self-cocking mode. The accepted meaning of "double-action" has, confusingly, come to be the same as "self-cocking", so modern revolvers that cannot be pre-cocked are called "double-action-only". These are intended for concealed carry, because the hammer of a traditional design is prone to snagging on clothes when drawn. Most revolvers do not come with an accessory rail, which is used for mounting lights and lasers, except for the Smith & Wesson M&P R8 (.357 Magnum), Smith & Wesson Model 325 Thunder Ranch (.45 ACP), and all versions of the Chiappa Rhino (.357 Magnum) except for the 2" model, respectively. However, certain revolvers, such as the Taurus Judge and Charter Arms revolvers, can be fitted with an accessory rail.
Most commonly, such guns have a 5- or 6-shot capacity, hence the common names of "six-gun" or "six-shooter". However, some revolvers have a 7- to 10-shot capacity, often depending on the caliber, and at least one revolver has a 12-shot capacity (the US Fire Arms Model 12/22). Each chamber has to be reloaded manually, which makes reloading a revolver a much slower procedure than reloading a semi-automatic pistol.
The alternatives are a replaceable cylinder, a speedloader which can reload all chambers at once, or a moon clip that holds a full load (or even half of one in the case of a half-moon clip) of ammunition and that is inserted along with the ammunition. In revolvers chambered for rimless cartridges, moon clips are normally required, though a few revolvers have been built with a special extractor with individual tabs to engage rimless cartridges. Another product known as a "speedstrip" cannot reload a completely empty revolver as rapidly as a speedloader, but is less expensive, flatter, and more flexible when it comes to partial reloads.
Compared to autoloading handguns, a revolver is often much simpler to operate and may have greater reliability. For example, should a semiautomatic pistol fail to fire, clearing the chamber requires manually cycling the action to remove the errant round, as cycling the action normally depends on the energy of a cartridge firing. With a revolver, this is not necessary as none of the energy for cycling the revolver comes from the firing of the cartridge, but is supplied by the user either through cocking the hammer or, in a double action design, by just squeezing the trigger. Another significant advantage of revolvers is superior ergonomics, particularly for users with small hands. A revolver's grip doesn't hold a magazine, and it can be designed or customized much more than the grip of a typical semi-automatic. Partially because of these reasons, revolvers still hold significant market share as concealed carry and home-defense weapons.
In general, revolvers stand up to long-term neglect better than semi-automatics. An example of neglect is the common scenario of a weapon kept for defense but rarely fired or maintained. A revolver can be kept loaded and ready to fire without fatiguing any springs and is not very dependent on lubrication for proper firing. Additionally, in the case of double-action-only revolvers there is no risk of accidental discharge from dropping alone, as the hammer is cocked by the trigger pull. However, a revolver is generally not as resistant to abuse as a semi-automatic (abuse meaning dropping the weapon, or allowing severe contamination by dirt or mud). The revolver's clockwork-like internal parts are relatively delicate and can become misaligned after a severe impact, and its revolving cylinder can become jammed by excessive dirt or debris.
Over the long period of development of the revolver, many calibers have been used. Some of these have proved more durable during periods of standardization and some have entered general public awareness. Among these are the .22 rimfire, a caliber popular for target shooting and teaching novice shooters; .38 Special and .357 Magnum, known for police use; the .44 Magnum, famous from Clint Eastwood's "Dirty Harry" films; and the .45 Colt, used in the Colt revolver of the Wild West. Introduced in 2003, the Smith & Wesson Model 500 is one of the most powerful revolvers, utilizing the .500 S&W Magnum cartridge.
Revolver technology does live on in other weapons used by the military. Some autocannons and grenade launchers use mechanisms similar to revolvers, and some riot shotguns use spring-loaded cylinders holding up to 12 rounds. In addition to serving as backup guns, revolvers still fill the specialized niche role as a shield gun; law enforcement personnel using a "bulletproof" ballistic shield (Gun shield) sometimes opt for a revolver instead of a self-loading pistol, because the slide of a pistol may strike the front of the shield when fired. Revolvers do not suffer from this disadvantage. A second revolver may be secured behind the shield to provide a quick means of continuity of fire. Many police also still use revolvers as their duty weapon due to their relative mechanical simplicity and user friendliness.
With the advancement of technology and design in 2010 major revolver manufacturers are coming out with polymer frame revolvers like the Ruger LCR, Smith & Wesson Bodyguard 38, and Taurus Protector Polymer. The new innovative design incorporates advanced polymer technology that lowers weight significantly, helps absorbs recoil, and strong enough to handle +P and .357 Magnum loads. The polymer is only used on the lower frame and joined to a metal alloy upper frame, barrel, and cylinder. Polymer technology is considered one of the major advancements in revolver history because the frame has always been metal alloy and mostly one piece frame design.
Another recent development in revolver technology is the Rhino, a revolver introduced by Italian manufacturer Chiappa in 2009 and first sold in the U.S. in 2010. The Rhino, built with the U.S. concealed carry market in mind, is designed so that the bullet fires from the bottom chamber of the cylinder instead of the top chamber as in standard revolvers. This is intended to reduce muzzle flip, allowing for faster and more accurate repeat shots. In addition, the cylinder cross-section is hexagonal instead of circular, further reducing the weapon's profile.
Loading and unloading 
Front loading 
The first revolvers were front loading, and were a bit like muskets in that the powder and bullet were loaded separately. These were caplocks or "cap and ball" revolvers, because the caplock method of priming was the first to be compact enough to make a practical revolver feasible. When loading, each chamber in the cylinder was rotated out of line with the barrel, and charged from the front with loose powder and an oversized bullet. Next, the chamber was aligned with the ramming lever underneath the barrel. Pulling the lever would drive a rammer into the chamber, which sealed it and held the ball and powder securely in place. Finally, the user would place percussion caps on the nipples on the rear face of the cylinder.
After each shot, a user was advised to raise his revolver vertically while cocking back the hammer so as to allow the fragments of the spent percussion cap to fall out safely. Otherwise, the fragments could fall into the revolver's mechanism and jam it. Caplock revolvers were also vulnerable to "chain fires", wherein hot gas from a shot ignited the powder in the other chambers. This could be prevented by sealing the chambers with cotton, wax, or grease.
Loading a cylinder in this manner was a slow and awkward process and generally could not be done in the midst of battle. Some soldiers solved this by carrying multiple revolvers in the field. Another solution was to use a revolver with a detachable cylinder design. These revolvers allowed the shooter to quickly remove a cylinder and replace it with a full one.
Fixed cylinder designs 
In many of the first generation of cartridge revolvers (especially those that were converted after manufacture), the pin on which the cylinder revolved was removed, and the cylinder taken from the gun for loading. Later models used a loading gate at the rear of the cylinder that allowed one cartridge at a time to be accessed for loading, while a rod under the barrel could be pressed backwards to extract the fired case. Most revolvers using this method of loading are single-action revolvers, although Iver Johnson produced double-action models with removable cylinders. The removable-cylinder design is employed in some modern "micro-revolvers" (usually in .22 caliber), in order to simplify their design. These weapons are small enough to fit in the palm of the hand.
The loading gate on the original Colt designs (and on nearly all single-action revolvers since, such as the famous Colt Single Action Army) is on the right side, which was done to facilitate loading while on horseback; with the revolver held in the left hand, the cartridges can easily be ejected and loaded with the right.
Since the cylinder in these revolvers is firmly attached at the front and rear of the frame, and since the frame is typically full thickness all the way around, fixed cylinder revolvers are inherently strong designs. Because of this, many modern large caliber hunting revolvers tend to be based on the fixed cylinder design. Fixed cylinder revolvers can fire the strongest and most powerful cartridges, but at the price of being the slowest to load and cannot use speedloaders or moon clips for loading, as only one chamber is exposed at a time to the loading gate.
Top break 
The next method used for loading and unloading cartridge revolvers was the top break design. In a top-break revolver, the frame is hinged at the bottom front of the cylinder. Releasing the lock and pushing the barrel down exposes the rear face of the cylinder. In most top-break revolvers, this act also operates an extractor that pushes the cartridges in the chambers back far enough that they will fall free, or can be removed easily. Fresh rounds are then inserted into the cylinder. The barrel and cylinder are then rotated back and locked in place, and the revolver is ready to fire.
Top break revolvers can be loaded more rapidly than fixed-frame revolvers, especially with the aid of a speedloader or moon clip. However, this design is much weaker and cannot handle high pressure rounds. While this design is mostly obsolete today, supplanted by the stronger yet equally convenient swing-out design, manufacturers have begun making reproductions of late 19th century designs for use in cowboy action shooting.
Swing out cylinder 
The last and most modern method of loading and unloading is the swing out cylinder. The cylinder is mounted on a pivot that is coaxial with the chambers, and the cylinder swings out and down (to the left in most cases). An extractor is fitted, operated by a rod projecting from the front of the cylinder assembly. When pressed, it will push all fired rounds free simultaneously (as in top break models, the travel is designed to not completely extract longer, unfired rounds). The cylinder may then be loaded, singly or again with a speedloader, closed, and latched in place.
The pivoting part that supports the cylinder is called the crane; it is the weak point of swing-out cylinder designs. Using the method often portrayed in movies and television of flipping the cylinder open and closed with a flick of the wrist can in fact cause the crane to bend over time, throwing the cylinder out of alignment with the barrel. Lack of alignment between chamber and barrel is a dangerous condition, as it can impede the bullet's transition from chamber to barrel. This gives rise to higher pressures in the chamber, bullet damage, and the potential for an explosion if the bullet becomes stuck.
The shock of firing can also put a great deal of stress on the crane, as in most designs the cylinder is only held closed at one point, the rear of the cylinder. Stronger designs, such as the Ruger Super Redhawk, use a lock in the crane as well as the lock at the rear of the cylinder. This latch provides a more secure bond between cylinder and frame, and allows the use of larger, more powerful cartridges. Swing out cylinders are rather strong, but not as strong as fixed cylinders, and great care must be taken with the cylinder when loading, so as not to damage the crane.
In a single-action revolver, the hammer is manually cocked, usually with the thumb of the firing or supporting hand. This action advances the cylinder to the next round and locks the cylinder in place with the chamber aligned with the barrel. The trigger, when pulled, releases the hammer, which fires the round in the chamber. To fire again, the hammer must be manually cocked again. This is called "single-action" because the trigger only performs a single action, of releasing the hammer. Because only a single action is performed and trigger pull is lightened, firing a revolver in this way allows most shooters to achieve greater accuracy. Additionally, the need to cock the hammer manually acts as a safety. The Colt Paterson Revolver, the Walker Colt, the Colt's Dragoon and the Colt Single Action Army pistol of the American Frontier era are all good examples of this system.
In double-action (DA), the stroke of the trigger pull generates three actions: (1) the hammer is pulled back to the cocked position (2) while the cylinder is being indexed to the next round, and then (3) the hammer is released to strike the firing pin. Thus DA means that a cocking action separate from the trigger pull is unnecessary; and every trigger pull will result in a complete cycle. This allows uncocked carry while also allowing draw-and-fire using only the trigger. A longer and harder trigger stroke is the trade-off, but this drawback can also be viewed as a safety feature, as the gun is safer against accidental discharges from being dropped.
Most double-action revolvers may be fired in two ways.
- The first way is single-action, that is, exactly the same as a single-action revolver; the hammer is cocked with the thumb, which indexes the cylinder, and when the trigger is pulled, the hammer is tripped.
- The second way is double action, that is, from a hammer-down position. In this case, the trigger first cocks the hammer and revolves the cylinder, and then trips the hammer at the rear of the trigger stroke, firing the round in the chamber.
Unlike most DA/SA semi-automatic pistols, for most revolvers, cocking the hammer with the thumb will give a more powerful hammer strike than when the hammer is cocked by pulling the trigger. This is due to the trigger design on revolvers. Manually cocking the hammer moves the hammer back to the point where it catches on the sear. Pulling the trigger when the hammer is not cocked moves the hammer back by means of a strut, or some other mechanism, which ultimately does not give the hammer as much rearward travel as manual cocking. The greater rearward travel afforded by manual cocking translates to greater force in the hammer fall.
Certain revolvers, called double action only (DAO) or, more correctly but less commonly self cocking, lack the latch that enables the hammer to be locked to the rear, and thus can only be fired in the double action mode. With no way to lock the hammer back, DAO designs tend to have bobbed or spurless hammers, and may even have the hammer completely covered by the revolver's frame (i.e., shrouded or hooded). These are generally intended for concealed carrying, where a hammer spur could snag when the revolver is drawn. The potential reduction in accuracy in aimed fire is offset by the increased capability for concealment.
DA and DAO revolvers were the standard-issue sidearm of countless police departments for many decades. Only in the 1990s did the semiautomatic pistol begin to make serious inroads, after the advent of safe actions such as the system developed by Glock. The reasons for these choices are the modes of carry and use. Double action is good for high-stress situations because it allows a mode of carry in which "draw and pull the trigger" is the only requirement—no safety catch release nor separate cocking stroke required. Although those seem simple to a person in calm circumstances, it is considered that less can go wrong with a simpler action when the user is highly stressed.
In the cap-and-ball days of the mid 19th century, two revolver models, the English Tranter and the American Savage “Figure Eight”, used a method whereby the hammer was cocked by the shooter’s middle finger pulling on a second trigger below the main trigger.
Iver Johnson made an unusual model from 1940 to 1947, called the Trigger Cocking Double Action. If the hammer was down, pulling the trigger would cock the hammer. If the trigger was pulled with the hammer cocked, it would then fire. This meant that to fire the revolver from a hammer down state, the trigger must be pulled twice.
Use with suppressors 
As a general rule, revolvers cannot be effective with a sound suppressor ("silencer"), as there is usually a small gap between the revolving cylinder and the barrel which a bullet must traverse or jump when fired. From this opening, a rather loud report is produced. A suppressor can only suppress noise coming from the muzzle.
A suppressible revolver design does exist in the Nagant M1895, a Belgian revolver used from 1895 through World War II. This revolver uses a unique cartridge whose case extends beyond the tip of the bullet, and a cylinder that moves forward to place the end of the cartridge inside the barrel when ready to fire. This bridges the gap between the cylinder and the barrel, and expands to seal the gap when fired. While the tiny gap between cylinder and barrel on most revolvers is insignificant to the internal ballistics, the seal is especially effective when used with a suppressor, and a number of suppressed Nagant revolvers have been used since its invention.
There is a modern revolver of Russian design, the OTs-38, which uses ammunition that incorporates the silencing mechanism into the cartridge case, making the gap between cylinder and barrel irrelevant as far as the suppression issue is concerned. The OTs-38 does need an unusually close and precise fit between the cylinder and barrel due to the shape of bullet in the special ammunition (Soviet SP-4), which was originally designed for use in a semi-automatic.
Additionally, the US Military experimented with designing a special version of the Smith & Wesson Model 29 for Tunnel Rats, called the Quiet Special Purpose Revolver or QSPR. Using special .40 caliber ammunition, it never entered official service.
Automatic revolvers 
The term "automatic revolver" has two different meanings, the first being used in the late nineteenth and early twentieth centuries when "automatic" referred not to the operational mechanism of firing, but of extraction. An "automatic revolver" in this context is one which extracts empty fired cases "automatically," i.e., upon breaking open the action, rather than requiring manual extraction of each case individually with a sliding rod or pin (as in the Colt Single Action Army design). This term was widely used in the advertising of the period as a way to distinguish such revolvers from the far more common rod-extraction types.
In the second sense, "automatic revolver" refers to the mechanism of firing rather than extraction. Double action revolvers use a long trigger pull to cock the hammer, thus negating the need to manually cock the hammer between shots. The disadvantage of this is that the long, heavy pull cocking the hammer makes the double action revolver much harder to shoot accurately than a single-action revolver (although cocking the hammer of a double action reduces the length and weight of the trigger pull). A rare class of revolvers, called automatic for its firing design, attempts to overcome this restriction, giving the high speed of a double action with the trigger effort of a single-action. The Webley-Fosbery Automatic Revolver is the most famous commercial example. It was recoil-operated, and the cylinder and barrel recoiled backwards to cock the hammer and revolve the cylinder. Cam grooves were milled on the outside of the cylinder to provide a means of advancing to the next chamber—half a turn as the cylinder moved back, and half a turn as it moved forward. .38 caliber versions held eight shots, .455 caliber versions six. At the time, the few available automatic pistols were larger, less reliable, and more expensive. The automatic revolver was popular when it first came out, but was quickly superseded by the creation of reliable, inexpensive semi-automatic pistols.
In 1997, the Mateba company developed a type of recoil-operated automatic revolver, commercially named the Mateba Autorevolver, which uses the recoil energy to auto-rotate a normal revolver cylinder holding six or seven cartridges, depending on the model. The company has made several versions of its Autorevolver, including longer barrelled and carbine variations, chambered for .357 Magnum, .44 Magnum and .454 Casull.
The Pancor Jackhammer is a combat shotgun based on a similar mechanism to an automatic revolver. It uses a Blow-Forward action to move the barrel forward (which unlocks it from the cylinder) and then rotate the cylinder and cock the hammer.
A submachine gun using the automatic revolver operation chambered in .22LR with 5 rotating barrels also exists.
Six gun 
A Six Gun is a revolver that holds six cartridges. The cylinder in a six gun is often called a 'wheel', and the six gun is itself often called a 'wheel gun'. Although a "Six Gun" can refer to any six-chambered revolver, it is typically a reference to the Colt Single Action Army, or its modern look-alikes such as the Ruger Vaquero and Beretta Stampede.
Until the 1970s, when older-design revolvers such as Colt Single Action Armys and Ruger Blackhawks were re-engineered with drop safeties (such as firing pin blocks, hammer blocks, or transfer bars) that prevent the firing pin from contacting the cartridge's primer unless the trigger is pulled, safe carry required the hammer being positioned over an empty chamber, reducing the available cartridges from six to five. This kept the uncocked hammer from resting directly on the primer of a cartridge. If not loaded in this manner, the hammer rests directly on a primer and unintentional firing may occur if the gun is dropped or the hammer is struck.
In the development of firearms, an important limiting factor was the time it took to reload the weapon after it was fired. While the user was reloading, the weapon was useless, and an adversary might be able to take advantage of the situation and kill or wound the user. Several approaches to the problem of increasing the rate of fire were developed, the earliest being multi-barrelled weapons which allowed two or more shots without reloading.
An example of these is the 3-Barrel Pole Gun, invented by the Chinese during the Ming Dynasty. The weapon consists of three barrels arranged in a triangle, with metal rings around the barrels. The barrels were mounted on a single wooden handle, which rested on a wooden pole. It is fired two handed by igniting the black powder through a touch hole on the barrel. The weapon is then rotated one-third of the way to bring the next barrel into the rotation. The ability to fire multiple shots before reloading it gave it great value for its time.
The first real revolvers were partly an attempt to improve on pepper-box type weapons, which used a revolving cylinder with one set of firing mechanisms, but which had multiple barrels as well. Firing through a single barrel saved the expense and weight of having the multiple barrels of the pepper-box.
The earliest example of a revolver is a revolving arquebus, produced by Hans Stopler of Nuremberg in 1597. Another early specimen, now in the Tower of London armouries, is dated to the middle 17th century and attributed to John Dafte of London. This example, a flintlock, uses a single lock, with a flash pan for each of the six chambers. The cylinder is rotated by hand, and locks in place for firing. This was still not perfected, however, as it was apparently destroyed by a misfire.
James Puckle patented a revolving chamber gun in 1718. This gun, which had a 1.25 inch bore (30 mm), was tripod mounted, and the 11-shot cylinder was operated by a hand crank. It is often cited as the first machine gun. By changing cylinders to reload (an early example of a speedloader), the gun was fired and reloaded to fire a total of 63 rounds in seven minutes. Elisha Collier patented a flintlock revolver in Britain in 1818, and significant numbers were being produced in London by 1822.
In 1836, Samuel Colt patented a revolver mechanism that led to the widespread use of the revolver. According to Samuel Colt, he came up with the idea for the revolver while at sea, inspired by the capstan winch, which had a ratchet and pawl mechanism on it, a version of which was used in his guns to rotate the cylinder. Revolvers proliferated largely due to Colt's ability as a salesman. But his influence spread in other ways as well; the build quality of his company's guns became famous, and its armories in America and England trained several seminal generations of toolmakers and other machinists, who had great influence in other manufacturing efforts of the next half century.
Early revolvers were caplocks and loaded like muskets: the user poured powder into a chamber, rammed down a bullet, then placed percussion caps between the hammer and cylinder. After firing a shot, the user would raise his pistol vertically as he cocked the hammer back so as to let the fragments of the percussion cap fall out and not jam the mechanism.
Revolvers have remained popular to the present day in many areas, although in the military and law enforcement they have largely been supplanted by magazine-fed semi-automatic pistols such as the Beretta M9, especially in circumstances where reload time and higher cartridge capacity are deemed important.
Elisha Collier of Boston, Massachusetts patented a flintlock revolver in Britain in 1818, and significant numbers were being produced in London by 1822. The origination of this invention is in doubt, as similar designs were patented in the same year by Artemus Wheeler in the United States and by Cornelius Coolidge in France. Samuel Colt submitted a British patent for his revolver in 1835 and an American patent (number 138) on February 25, 1836 for a Revolving gun, and made the first production model on March 5 of that year.
Another revolver patent was issued to Samuel Colt on August 29, 1839. The February 25, 1836 patent was then reissued as U.S. Patent RE00,124 entitled Revolving gun to Samuel Colt on October 24, 1848. This was followed by U.S. Patent 0,007,613 on September 3, 1850 for a Revolver, and by U.S. Patent 0,007,629 on September 10, 1850 for a Revolver. U.S. Patent 5,333,531 was issued to Roger C. Field for an economical device for minimizing the flash gap of a revolver between the barrel and the cylinder. In 1855, Rollin White patented the bored-through cylinder entitled Improvement in revolving fire-arms U.S. Patent 00,093,653. In 1856 Horace Smith & Daniel Wesson formed a partnership (S&W), developed and manufactured a revolver chambered for a self-contained metallic cartridge.
Notable brands and manufacturers 
Colt New Service revolver
Smith & Wesson Model 625 for IPSC shooting
Smith & Wesson Model 625JM, as designed by Jerry Miculek.
Taurus .357 Magnum Model 605
Taurus .45 Colt/.410 bore Model 4510 'The Judge'
Belgian-made Lefaucheux revolver, circa 1860-1865
A Russian Nagant M1895
See also 
- Antique gun
- Colt Diamondback
- Handgun effectiveness
- List of handgun cartridges
- List of cartridges by caliber
- List of revolvers
- Revolver cannon
- Russian roulette
- Table of handgun and rifle cartridges by year
- Patterson Colt schematics
- S&W revolver
- US patent 4127955
- Frank James. Effective Handgun Defense: A Comprehensive Guide to Concealed Carry. p. 99.
- Taylor, Chuck (2009-08-29). "Why The Revolver Won’t Go Away". Tactical-Life.com. Retrieved 2009-09-16.
- R.K. Campbell. "Tips For Lefties Shooting In a Right Handed World". GunWeek.com. Retrieved 2007-11-13.
- S. P. Fjestad (1992). Blue Book of Gun Values, 13th Ed. Blue Book Publications, Inc. ISBN 0-9625943-4-2.
- "Silenced 7.62 mm Nagant Revolver". Guns.connect.fi. 2000-09-18. Retrieved 2009-09-16.
- "OTs-38 silent revolver". Modern Firearms. Retrieved 2009-09-16.
- Popenker, Max R. "Smith & Wesson/ AAI Quiet Special Purpose Revolver/ QSPR/ Tunnel Revolver ", world.guns.ru, Retrieved 2010-04-05
- Smith, Clint (September 2004). "Wheel guns are real guns". Findarticles.com. Guns Magazine. Retrieved 17 September 2010.
- Gromer, Cliff (August 2002). "New Guns of the Old West". Popular Mechanics: 86–89.
- Handloader Ammunition Reloading Journal, August 2009 edition in the "From the Hip" article by Brian Pearce. Page 32.
- The 3 Barrel Gun
- Roger Pauly (2004). Firearms: The Life Story of a Technology. Greenwood Publishing Group. ISBN 0-313-32796-3.
- Samuel Colt (1855). On the Application of Machinery to the Manufacture of Rotating Chambered-Breech Fire-Arms, and Their Peculiarities. W. Clowes.
- Griswold and Gunnison revolvers
|Wikimedia Commons has media related to: Revolvers|
- The Colt Revolver in the American West
- Animation showing the internal workings of a revolver
- How to Load a Cap and Ball Revolver
- The Snubnose Files
- How Stuff Works - Revolver
- Full-Auto Colt SAA
- U.S. Patent RE124—Revolving gun
- U.S. Patent 1,304—Improvement in firearms
- U.S. Patent 7,613—Revolver
- U.S. Patent 7,629—Revolver