Flintlock

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, also known as the "true flintlock", that was introduced in the early 17th century, and gradually replaced earlier firearm-ignition technologies, such as the matchlock, the wheellock, and the earlier flintlock mechanisms.
The true flintlock continued to be in common use for over two centuries, replaced by percussion cap and, later, the cartridge-based systems in the early-to-mid 19th century. Although long superseded by modern firearms, flintlock weapons enjoy continuing popularity with black-powder shooting enthusiasts.
History.
French court gunsmith Marin le Bourgeoys made a firearm incorporating a flintlock mechanism for King Louis XIII shortly after his accession to the throne in 1610. However, firearms using some form of flint ignition mechanism had already been in use for over half a century. The development of firearm lock mechanisms had proceeded from the matchlock to wheellock to the earlier flintlocks (snaplock, snaphance, miquelet, and doglock) in the previous two centuries, and each type had been an improvement, contributing design features to later firearms which were useful. Le Bourgeoys fitted these various features together to create what became known as "the" flintlock or "true" flintlock.
The new flintlock system quickly became popular, and was known and used in various forms throughout Europe by 1630, although older flintlock systems continued to be used for some time. Examples of early flintlock muskets can be seen in the painting "Marie de' Medici as Bellona" by Rubens (painted around 1622-25). These flintlocks were in use for alongside older firearms such as matchlocks, wheellocks, and miquelet locks for nearly a hundred years. The last major European power to standardize the flintlock was the Holy Roman Empire, when in 1702 the Emperor instituted a new regulation that all matchlocks were to be converted or scrapped.
Various breech-loading flintlocks were developed starting around 1650. The most popular action has a barrel which was unscrewed from the rest of the gun. Obviously this is more practical on pistols because of the shorter barrel length. This type is known as a Queen Anne pistol because it was during her reign that it became popular (although it was actually introduced in the reign of King William III). Another type has a removable screw plug set into the side or top or bottom of the barrel. A large number of sporting rifles were made with this system, as it allowed easier loading compared with muzzle loading with a tight fitting bullet and patch.
One of the more successful was the system built by Isaac de la Chaumette starting in 1704. The barrel could be opened by 3 revolutions of the triggerguard, to which it was attached. The plug stayed attached to the barrel and the ball and powder were loaded from the top. This system was improved in the 1770s by Colonel Patrick Ferguson and 100 experimental rifles used in the American Revolutionary War. The only two flintlock breechloaders to be produced in quantity were the Hall and the Crespi. The first was invented by John Hall and patented c. 1817. It was issued to the U.S. Army as the Model 1819 Hall Breech Loading Rifle.
The Hall rifles and carbines were loaded using a combustible paper cartridge inserted into the upward tilting breechblock. Hall rifles leaked gas from the often poorly fitted action. The same problem affected the muskets produced by Giuseppe Crespi and adopted by the Austrian Army in 1771. Nonetheless, the Crespi System was experimented with by the British during the Napoleonic Wars, and percussion Halls guns saw service in the American Civil War.
Flintlock weapons were commonly used until the mid 19th century, when they were replaced by percussion lock systems. Even though they have long been considered obsolete, flintlock weapons continue to be produced today by manufacturers such as Pedersoli, Euroarms, and Armi Sport. Not only are these weapons used by modern re-enactors, but they are also used for hunting, as many U.S. states have dedicated hunting seasons for black-powder weapons, which includes both flintlock and percussion lock weapons.
Subtypes.
Flintlocks may be any type of small arm: long gun or pistol, smoothbore or rifle, muzzleloader or breechloader.
Pistols.
Flintlock pistols were used as self-defense weapons and as a military arm. Their effective range was short, and they were frequently used as an adjunct to a sword or cutlass. 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 we use having been applied by collectors and dealers long after the pistols were obsolete. The smallest were less than long and the largest were over . From around the beginning of the 1700s the larger pistols got shorter, so that by the late 1700s the largest would be more like long. The smallest would fit into a typical pocket or a hand warming muff and could easily be carried by women.
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, the coach pistol, 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. Arguably the most elegant of the pistol designs was the Queen Anne pistol, which was made in all sizes.
Probably the high point of the mechanical development of the flintlock pistol was the British duelling pistol; it was highly reliable, water resistant and accurate. External decoration was minimal but craftsmanship was evident, and the internal works were often finished to a higher degree of craftsmanship than the exterior. Dueling pistols were the size of the horse pistols of the late 1700s, around long and were usually sold in pairs along with accessories in a wooden case with compartments for each piece.
Muskets.
Flintlock muskets were the mainstay of European armies between 1660 and 1840. A musket was a muzzle-loading smoothbore long gun that was loaded with a round lead ball, but it could also be loaded with shot for hunting. For military purposes, the weapon was loaded with ball, or a mixture of ball with several large shot (called buck and ball), and had an effective range of about 75 to 100 metres. Smoothbore weapons that were designed for hunting birds were called "fowlers." Flintlock muskets tended to be of large caliber and usually had no choke, allowing them to fire full-caliber balls.
Military flintlock muskets tended to weigh approximately ten pounds, as heavier weapons were found to be too cumbersome, and lighter weapons were not rugged or heavy enough to be used in hand-to-hand combat. They were usually designed to be fitted with a bayonet. On flintlocks, the bayonet played a much more significant role, often accounting for a third or more of all battlefield casualties . This is a rather controversial topic in history though, given that casualties list from several battles in the 18th century showed that less than 2% of wounds were caused by bayonets.
Antoine-Henri Jomini, a celebrated military author of the Napoleonic period who served in numerous armies during that period, stated that the majority of bayonet charges in the open resulted with one side fleeing before any contacts were made. Flintlock weapons were not used like modern rifles. They tended to be fired in mass volleys, followed by bayonet charges in which the weapons were used much like the pikes that they replaced. Because they were also used as pikes, military flintlocks tended to be approximately in length (without the bayonet attached), and used bayonets that were approximately in length.
Rifles.
In Germany the jäger rifle was developed by the late 18th century. It was used for hunting, and in a military context, skirmishing and by specialist marksmen. 
In the United States, the small game hunting long rifle ("Pennsylvania rifle" or "Kentucky rifle") was developed in southeastern Pennsylvania in the early 1700s. Based on Jäger rifle, but with a much longer barrel, these were exceptionally accurate for their time, and had an effective range of approximately 250 meters. They tended to fire smaller caliber rounds, with calibers in the range of .32 to .45 being common - hence being sometimes referred to as a "pea rifle".
The jezail was a military long flintlock rifle, developed and popular throughout Afghanistan, India, Central Asia and parts of the Middle East.
However, while European military tactics remained based on loosely-aimed mass volleys, most of their flintlocks were still smoothbore - as the spiral grooves of rifling made rifles take more time to load, and after repeated shots black powder tended to foul the barrels. 
Rifled flintlocks saw most military use by sharpshooters, skirmishers, and other support units. While by the late 18th century there were increasing efforts to take advantage of the rifle for military purposes, with specialist rifle units such as the King's Royal Rifle Corps of 1756 and Rifle Brigade (Prince Consort's Own), smoothbores predominated until the advent of the Minié ball – by which time the percussion cap had made the flintlock obsolete.
Multishot flintlock weapons.
Multiple barrels.
Because of the time needed to reload (even experts needed 15 seconds to reload a smooth-bore, muzzle-loading musket), flintlocks were sometimes produced with two, three, four or more barrels for multiple shots. These designs tended to be costly to make and were often unreliable and dangerous. While weapons like double barreled shotguns were reasonably safe, weapons like the pepperbox revolver would sometimes fire all barrels simultaneously, or would sometimes just explode in the user's hand. It was often less expensive, safer, and more reliable to carry several single-shot weapons instead.
Single barrel.
Some repeater rifles, multishot single barrel pistols, and multishot single barrel revolvers were also made. Notable are the Puckle gun, Mortimer, Kalthoff, Michele Lorenzoni, Abraham Hill, Cookson pistols, the Jennings repeater and the Elisha Collier revolver.
Drawbacks.
Flintlocks were prone to many problems compared to modern weapons. Misfires were common. The flint had to be properly maintained, as a dull or poorly knapped piece of flint would not make as much of a spark and would increase the misfire rate dramatically. Moisture was a problem, since moisture on the frizzen or damp powder would prevent the weapon from firing. This meant that flintlock weapons could not be used in rainy or damp weather. Some armies attempted to remedy this by using a leather cover over the lock mechanism, but this proved to have only limited success.
Accidental firing was also a problem for flintlocks. A burning ember left in the barrel could ignite the next powder charge as it was loaded. This could be avoided by waiting between shots for any leftover residue to completely burn. Running a lubricated cleaning patch down the barrel with the ramrod would also extinguish any embers, and would clean out some of the barrel fouling as well. Soldiers on the battlefield could not take these precautions though. They had to fire as quickly as possible, often firing three to four rounds per minute. Loading and firing at such a pace dramatically increased the risk of an accidental discharge.
When a flintlock was fired it sprayed a shower of sparks forwards from the muzzle and another sideways out of the flash-hole. One reason for firing in volleys was to ensure that one man's sparks didn't ignite the next man's powder as he was in the act of loading.
An accidental frizzen strike could also ignite the main powder charge, even if the pan had not yet been primed. Some modern flintlock users will still place a leather cover over the frizzen while loading as a safety measure to prevent this from happening. However, this does slow down the loading time, which prevented safety practices such as this from being used on the battlefields of the past.
The black powder used in flintlocks would quickly foul the barrel, which was a problem for rifles and for smooth bore weapons that fired a tighter fitting round for greater accuracy. Each shot would add more fouling to the barrel, making the weapon more and more difficult to load. Even if the barrel was badly fouled, the flintlock user still had to properly seat the round all the way to the breech of the barrel. Leaving an air gap in between the powder and the round (known as "short starting") was very dangerous, and could cause the barrel to explode.
Handling loose black powder was also dangerous, for obvious reasons. Powder measures, funnels, and other pieces of equipment were usually made out of brass to reduce the risk of creating a spark, which could ignite the powder. Soldiers often used pre-made "cartridges", which unlike modern cartridges were not inserted whole into the weapon. Instead, they were tubes of paper that contained a pre-measured amount of powder and a lead ball. Although paper cartridges were safer to handle than loose powder, their primary purpose was not safety related at all. Instead, paper cartridges were used mainly because they sped up the loading process. A soldier did not have to take the time to measure out powder when using a paper cartridge. He simply tore open the cartridge, used a small amount of powder to prime the pan, then dumped the remaining powder from the cartridge into the barrel.
The black powder used in flintlocks contained sulfur. If the weapon was not cleaned after use, the powder residue would absorb moisture from the air and would combine it with the sulfur to produce sulfuric acid. This acid would erode the inside of the gun barrel and the lock mechanism. Flintlock weapons that were not properly cleaned and maintained would corrode to the point of being destroyed.
Most flintlocks were produced at a time before modern manufacturing processes became common. Even in mass-produced weapons, parts were often handmade. If a flintlock became damaged, or parts wore out due to age, the damaged parts were not easily replaced. Parts would often have to be filed down, hammered into shape, or otherwise modified so that they would fit, making repairs much more difficult. Machine-made, interchangeable parts began to be used only shortly before flintlocks were replaced by caplocks.
Method of operation.
The gun is now in a "primed and loaded" state, and this is how it would typically be carried while hunting or if going into battle.
To fire:
The British Army and the Continental Army, both used paper cartridges to load their weapons. The powder charge and ball were instantly available to the soldier inside this small paper envelope. To load a flintlock weapon using a paper cartridge, a soldier would
The weapon can then be fully cocked and fired.
Cultural impact.
Firearms using some form of flintlock mechanism were the main form of firearm for over 200 years. It was not until Reverend Alexander John Forsyth invented a rudimentary percussion cap system in 1807 that the flintlock system began to decline in popularity. The percussion ignition system was more weatherproof and reliable than the flintlock, but the transition from flintlock to percussion cap was a slow one, and the percussion system was not widely used until around 1830. The Model 1840 U.S. musket was the last flintlock firearm produced for the U.S. military. However, obsolete flintlocks saw action in the earliest days of the American Civil War. For example, in 1861, the Army of Tennessee had over 2,000 flintlock muskets in service.
As a result of the flintlock's long active life, it left lasting marks on the language and on drill and parade. Terms such as: ", " and "" remain current in English. In addition, the weapon positions and drill commands that were originally devised to standardize carrying, loading and firing a flintlock weapon remain the standard for drill and display (see manual of arms).