1.
.45 ACP
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The.45 ACP, or.45 Auto is a handgun cartridge designed by John Browning in 1905, for use in his prototype Colt semi-automatic pistol. After successful military trials it was adopted along with the Browning.45 Colt handgun as the.45 M1911 cartridge, the handgun was designated M1911 handgun. The U. S. Cavalry had been buying and testing various handguns in the late 1890s, the.45 Colt Single Action Army had largely been replaced, even by some double-action versions of the same caliber. The Army had fielded some double-action revolvers in.38 Long Colt and they determined the.38 caliber round was significantly less effective than the.45 Colt against determined opponents such as the Moro juramentado warriors encountered in the Moro Rebellion. This experience, and the Thompson–LaGarde Tests of 1904 led the Army and they noted, however, training was critical to make sure a soldier could score a hit in a vulnerable part of the body. The result from Colt was the Model 1905 and the new.45 ACP cartridge. The resulting. 45-caliber cartridge, named the.45 ACP, was similar in performance to the.45 Schofield cartridge, by 1906, bids from six makers were submitted, among them Brownings design, submitted by Colt. Only DWM, Savage, and Colt made the first cut, DWM, which submitted two Parabellum P08s chambered in.45 ACP, withdrew from testing after the first round of tests, for unspecified reasons. In the second round of evaluations in 1910, the Colt design passed the testing with no failures. The Colt pistol was adopted as the Model 1911, the cartridge/pistol combination was quite successful but not satisfactory for U. S. military purposes. The very first production, at Frankford Arsenal, was marked F A811, the cartridge was designed by John Browning for Colt, but the most influential person in selecting the cartridge was Army Ordnance member Gen. John T. Thompson. Thompson insisted on a real man stopper pistol, following the showing of the Armys.38 Long Colt pistols during the Philippine–American War. The.45 ACP has 1.62 ml cartridge case capacity.45 ACP maximum C. I. P. The common rifling twist rate for this cartridge is 406 mm,6 grooves, Ø lands =11.23 mm, Ø grooves =11.43 mm, land width =3.73 mm and the primer type is large pistol. The cartridge headspaces on the mouth of the case at the L3 datum reference, according to Commission Internationale Permanente pour lEpreuve des Armes à Feu Portatives rulings, the.45 ACP cartridge case can handle up to 131.000 MPa Pmax piezo pressure. In CIP-regulated countries every pistol cartridge combination has to be proofed at 130% of this maximum CIP pressure to certify for sale to consumers and this means that.45 ACP chambered arms in C. I. P. Regulated countries are proof tested at 170.30 MPa PE piezo pressure. The SAAMI pressure limit for the.45 ACP is set at 21,000 psi piezo pressure, while the SAAMI pressure limit for the.45 ACP +P is set at 23,000 psi, piezo pressure
2.
Gauge (bore diameter)
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The gauge of a firearm is a unit of measurement used to express the inner diameter of the barrel. Thus there are twelve 12-gauge balls per pound, etc, the term is related to the measurement of cannon, which were also measured by the weight of their iron round shot, an 8 pounder would fire an 8 lb ball. These very large rifles, sometimes called elephant guns, were intended for use in India, gauge is abbreviated ga. ga, or G. The space between the number and the abbreviation is often left out, as in 12ga. Therefore, a shotgun or n-bore rifle has a bore diameter of approximately d n =11.33 Explanation. Divide it by 11.3 to find the volume of the ball, multiply it by 0.75 and divide it by pi, then find its cube root, to find its radius in cm. Multiply it by 2 to find the diameter in cm, Divide it by 2.54 to find the diameter in inches. This simplifies to d n =1.67 / n 3 to find the diameter in inches of the barrel of an n-gauge shotgun. Therefore, if the diameter is in inches, n =4.66 / d n 3 Another source for a gauge size formula can be found in page Shotgun shell#Shotgun gauge diameter formula. Since shotguns were not originally intended to fire projectiles, but rather a compressible mass of shot. The fact that most shotgun bores are not cylindrical also causes deviations from the bore diameter. The chamber of the gun is larger, to accommodate the thickness of the walls. The forcing cone can be as short as a fraction of an inch, or as long as a few inches on some guns. At the muzzle end of the barrel, the choke can constrict the bore even further, so measuring the diameter of a shotgun is not a simple process. Shotgun bores are commonly overbored or backbored, meaning that most of the bore is larger than the value given by the formula. This is claimed to reduce recoil and improve patterning. A 12-gauge shotgun, nominally 18.5 mm, can range from a tight 18.3 mm to an extreme overbore of 20.3 mm. Some also claim an increased velocity with the barrels, up to 15 m/s
3.
Shotgun
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Shotguns come in a wide variety of sizes, ranging from 5. A shotgun is generally a smoothbore firearm, which means that the inside of the barrel is not rifled, preceding smoothbore firearms, such as the musket, were widely used by armies in the 18th century. The direct ancestor to the shotgun, the blunderbuss, was used in a similar variety of roles from self-defense to riot control. It was often used by cavalry troops because of its shorter length and ease of use. In the 19th century, however, these weapons were replaced on the battlefield with breechloading rifled firearms. The military value of shotguns was rediscovered in the First World War, since then, it has been used in a variety of roles in civilian, law enforcement, and military applications. The shot pellets from a spread upon leaving the barrel, and the power of the burning charge is divided among the pellets. In a hunting context, this makes shotguns useful primarily for hunting birds, however, in a military or law enforcement context, the large number of projectiles makes the shotgun useful as a close quarters combat weapon or a defensive weapon. Militants or insurgents may use shotguns in asymmetric engagements, as shotguns are commonly owned civilian weapons in many countries, shotguns are also used for target shooting sports such as skeet, trap, and sporting clays. These involve shooting clay disks, known as clay pigeons, thrown in various ways, shotguns come in a wide variety of forms, from very small up to massive punt guns, and in nearly every type of firearm operating mechanism. The common characteristics that make a unique center around the requirements of firing shot. These features are the typical of a shotgun shell, namely a relatively short, wide cartridge, with straight walls. Ammunition for shotguns is referred to in the USA as shotgun shells, shotshells, the term cartridges is standard usage in the United Kingdom. The shot is fired from a smoothbore barrel, another configuration is the rifled slug barrel. The typical use of a shotgun is against small and fast moving targets, the spreading of the shot allows the user to point the shotgun close to the target, rather than having to aim precisely as in the case of a single projectile. The disadvantages of shot are limited range and limited penetration of the shot, which is why shotguns are used at short ranges, and typically against smaller targets. Larger shot sizes, up to the case of the single projectile slug load, result in increased penetration. Aside from the most common use against small, fast moving targets, First, it has enormous stopping power at short range, more than nearly all handguns and many rifles
4.
Revolver
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A revolver is a repeating handgun that has a revolving cylinder containing multiple chambers and at least one barrel for firing. Revolvers might be regarded as a subset of pistols, or as a subset of handguns. Though the term revolver usually only refers to handguns, other firearms may also have a revolving chamber and these include some models of grenade launchers, shotguns, and rifles. Most revolvers contain five or six rounds in the cylinder, though the original name was revolving gun, the short-hand revolver is universally used. 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 back with his free hand or thumb. In a double-action revolver, pulling the trigger moves the back, then releases it. Loading and unloading a double-action revolver requires the operator to swing out the cylinder and insert the proper ammunition, the first guns with multichambered cylinders that revolved to feed one barrel were made in the late 16th century in Europe. They were expensive and rare curiosities, not until the 19th century would revolvers become common weapons of industrial production. One of the first was a flintlock revolver patented by Elisha Collier in 1814, the first percussion revolver was made by Lenormand of Paris in 1820 and the first percussion cap revolver was invented by the Italian Francesco Antonio Broccu in 1833. He received a prize of 300 francs for his invention, although he did not patent it, however, in 1835 a similar handgun was patented by Samuel Colt, who would go on to make the first mass-produced revolver. The first cartridge revolvers were produced around 1854 by Eugene Lefaucheux, revolvers soon became standard for nearly all uses. In the early 20th century, semi-automatic pistols were developed, which can hold more rounds, Automatic pistols also have a flat profile, more suitable for concealed carry. Automatic pistols have almost completely replaced revolvers in military and law enforcement use, revolvers still remain popular as back-up and off-duty handguns among American law enforcement officers and security guards. Also, revolvers are still common in the American private sector as defensive, 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, 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. Later weapons featured multiple barrels revolving along a single axis, the earliest examples of what today is called a revolver were made in Germany in the late 16th century. These weapons featured a barrel with a revolving cylinder holding the powder
5.
Pistol
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A pistol is a type of handgun. In some usage, the term refers to a subset of handguns. In other usage, the term is interchangeable with handgun, some handgun experts and dictionaries make a technical distinction that views pistols as a subset of handguns, others use the terms interchangeably. But UK/rest of Commonwealth usage does not always make this distinction, for example, the official designation of the Webley Mk VI revolver was Pistol, Revolver, Webley, No.1 Mk VI. The English word was introduced in ca.1570 from the Middle French pistolet, the etymology of the French word pistolet is disputed. The first suggestion derives the word from Czech píšťala, a type of hand-cannon used in the Hussite Wars during the 1420s, the Czech word was adopted in German as pitschale, pitschole, petsole, and variants. The second suggestion is less likely, the use of the word as a designation of a gun is not documented before 1605 in Italy, long after it was used in French, the Czech word is well documented since the Hussite wars in 1420s. Other suggestions include from Middle High German pischulle or from Middle French pistole, also it is suggested that early pistols were carried by cavalry in holsters hung from the pommel of a horses saddle. The most common types of pistol are the shot. Single shot handguns were mainly seen during the era of flintlock and musket weaponry where the pistol was loaded with a ball and fired by a flint striker. However, as technology improved, so did the single shot pistol, new operating mechanisms were created, and due to this, they are still made today. It is the oldest type of pistol, and is used to hunt wild game. Multi-barreled pistols were common during the time as single shot pistols. As designers looked for ways to increase fire rates, multiple barrels were added to all guns including pistols, one example of a multi-barreled pistol is the Ducks foot pistol, which generally had either four or eight barrels, although some 20th century models had three barrels. Around 1850, pistols such as the Jarre harmonica gun were produced that had a sliding magazine, the sliding magazine contained pinfire cartridges or speedloaders. The magazine needed to be moved manually in many designs, hence distinguishing them from semi-automatic pistols, with the development of the revolver in the 19th century, gunsmiths had finally achieved the goal of a practical capability for delivering multiple loads to one handgun barrel in quick succession. The semi-automatic pistol was the step in the development of the pistol. By avoiding multiple chambers—which need to be individually reloaded—semi-automatic pistols delivered faster rates of fire, an example of a modern blow back action semi-automatic pistol is the HK VP70
6.
Shotgun shell
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A shotgun shell is a self-contained cartridge typically loaded with multiple metallic shot, which are small, generally spherical projectiles. Traditionally lead was used, but increasingly steel, tungsten or bismuth shot has replaced lead, due to laws designed to protect the environment. An old non-lethal shotgun load consisted of a shell loaded with rock salt, which could inflict very painful, but rarely deadly, wounds. Most shotgun shells are designed to be fired from a smoothbore barrel, a rifled barrel will increase the accuracy of slugs, but makes it unsuitable for firing shot, as it imparts a spin to the shot cup, causing a centrifugal force that makes the shot cluster disperse. Specialty shotgun ammunition includes non-lethal rounds available in the form of slugs made of low-density material, early shotgun shells used brass cases, not unlike rifle and pistol cartridge cases of the same era. These brass shotgun hulls or cases closely resembled rifle cartridges, in terms of both the head and primer portions of the shell, as well as in their dimensions. Card wads, made of felt, leather, and cork, waterglass was commonly used to cement the top overshot wad into these brass shell casings. No roll crimp or fold crimp was used on these early brass cases, the primers on these early shotgun shells were identical to pistol primers of the same diameter. Starting in about 1877, paper hulls started to replace brass shotgun shells, paper hulls remained popular for nearly a century, until the late 1960s. These shotgun shells using paper hulls were nearly always roll crimped, although fold crimping also eventually became popular. Card wads, made of felt and cork, as well as paperboard, were all used at times, gradually giving way to plastic over powder wads, with card wads. Starting in the 1960s, plastic cases started to replace paper hulls for shotgun shells, by the 1980s, plastic cases had largely replaced nearly all paper hulls for shotgun shells. Today, modern shotgun shells typically consist of a plastic case, as noted previously, paper shells used to be common, and are still made, as are solid brass shells. Some companies have produced what appear to be all-plastic shells, although in these there is a metal ring cast into the rim of the shell to provide strength. Often the more powerful loads will use high brass shells, with the extended up further along the sides of the shell. The brass does not actually provide a significant amount of strength, the base of the shotshell is fairly thick to hold the large shotgun primer, which is longer than primers used for rifle and pistol ammunition. After the powder comes the wadding or wad, the primary purpose of a wad is to prevent the shot and powder from mixing, and to provide a seal that prevents gas from blowing through the shot rather than propelling it. The wad design may encompass a shock absorber and a cup that holds the shot together until it is out the barrel
7.
Game (hunting)
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Game or quarry is any animal hunted for sport or for food. The type and range of animals hunted for food varies in different parts of the world, in some countries, game is classified, including legal classification with respect to licences required, as either small game or large game. Game or quarry is any animal hunted for sport or for food, the term game arises in medieval hunting terminology by the late 13th century and is particular to English, from the generic meaning of Old English gamen joy, amusement, sport, merriment. Small game includes animals, such as rabbits, pheasants. Large game includes animals like deer and bear, big game is a term sometimes used interchangeably with large game although in other contexts it refers to large, typically African, mammals which are hunted mainly for trophies in safaris. The type and range of animals hunted for food varies in different parts of the world and this is influenced by climate, animal diversity, local taste and locally accepted views about what can or cannot be legitimately hunted. Sometimes a distinction is made between varieties and species of a particular animal, such as wild turkey and domestic turkey. Fish caught for sport are referred to as game fish, the flesh of the animal, when butchered for consumption is often described as having a gamey flavour. This difference in taste can be attributed to the diet of the animal. In some countries, game is classified, including legal classification with respect to licences required, a single small game licence may cover all small game species and be subject to yearly bag limits. Large game are often subject to individual licensing where a licence is required for each individual animal taken. In some parts of Africa, wild animals hunted for their meat are called bushmeat, see article for more detailed information on how this operates within the economy. In Africa, animals hunted for their pelts or ivory are sometimes referred to as the big game, also see the legal definition of game in Swaziland. South Africa has 62 species of gamebirds, including guineafowl, francolin, partridge, quail, sandgrouse, duck, geese, snipe, bustard, of the remaining 41 species,24 have shown an increase in numbers and distribution range in the last 25 years or so. The status of 14 species appears unchanged, with insufficient information being available for the three species. S. and Canada, deer are the most commonly hunted big game. Other game species include, In the PRC there is a special category called ye wei. In the UK game is defined in law by the Game Act 1831 and it is illegal to shoot game on Sundays or at night. Other that are hunted for food in the UK are specified under the Wildlife, the ban is generally considered voluntary on private lands, and few birds live away from RSPB or Forestry Commission land allegedly
8.
Hunting
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Hunting is the practice of killing or trapping animals, or pursuing or tracking them with the intent of doing so. Hunting wildlife or feral animals is most commonly done by humans for food, recreation, to predators that are dangerous to humans or domestic animals. Lawful hunting is distinguished from poaching, which is the killing, trapping or capture of the hunted species. The species that are hunted are referred to as game or prey and are usually mammals, Hunting can also be a means of pest control. However, hunting has also contributed to the endangerment, extirpation and extinction of many animals. The pursuit, capture and release, or capture for food of fish is called fishing, the practice of foraging or gathering materials from plants and mushrooms is also considered separate from hunting. The word hunt serves as both a noun and a verb, the noun has been dated to the early 12th century, act of chasing game, from the verb hunt. The meaning of a body of persons associated for the purpose of hunting with a pack of hounds is first recorded in the 1570s, meaning the act of searching for someone or something is from about 1600. The verb, Old English huntian to chase game, perhaps developed from hunta hunter, is related to hentan to seize, from Proto-Germanic huntojan, the general sense of search diligently is first recorded c. Hunting has a history and may well pre-date the rise of the species Homo sapiens. Evidence from western Kenya suggests that hunting has been occurring for more two million years. Furthermore, evidence exists that hunting may have one of the multiple environmental factors leading to the Holocene extinction of megafauna. North American megafauna extinction was coincidental with the Younger Dryas impact event, however, in other locations such as Australia, humans are thought to have played a very significant role in the extinction of the Australian megafauna that was widespread prior to human occupation. The closest surviving relatives of the species are the two species of Pan, the common chimpanzee and bonobos. Common chimpanzees have a diet that includes troop hunting behaviour based on beta males being led by an alpha male. Bonobos have also observed to occasionally engage in group hunting. With the establishment of language, culture, and religion, hunting became a theme of stories and myths, as well as such as dance. Hunting was a component of hunter-gatherer societies before the domestication of livestock
9.
Pest control
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Pest control refers to the regulation or management of a species defined as a pest, and can be perceived to be detrimental to a persons health, the ecology or the economy. A practitioner of pest control is called an exterminator, Pest control is at least as old as agriculture, as there has always been a need to keep crops free from pests. In order to maximize production, it is advantageous to protect crops from competing species of plants. Techniques such as rotation, companion planting, and the selective breeding of pest-resistant cultivars have a long history. In the UK, following concern about animal welfare, humane pest control, for instance, with the urban red fox which territorial behaviour is used against the animal, usually in conjunction with non-injurious chemical repellents. In rural areas of Britain, the use of firearms for pest control is quite common, chemical pesticides date back 4,500 years, when the Sumerians used sulfur compounds as insecticides. The Rig Veda, which is about 4,000 years old, in the 20th century, the discovery of several synthetic insecticides, such as DDT, and herbicides boosted this development. Many pests have only become a problem as a result of the actions by humans. Modifying these actions can often reduce the pest problem. In the United States, raccoons caused a nuisance by tearing open refuse sacks, many householders introduced bins with locking lids, which deterred the raccoons from visiting. House flies tend to accumulate wherever there is activity and live in close association with people all over the world especially where food or food waste is exposed. Similarly, seagulls have become pests at many seaside resorts, tourists would often feed the birds with scraps of fish and chips, and before long, the birds would rely on this food source and act aggressively towards humans. Living organisms evolve and increase their resistance to biological, chemical, physical or any form of control. Perhaps as far ago as 3000BC in Egypt, cats were being used to control pests of grain such as rodents. In 1939/40 a survey discovered that cats could keep a population of rats down to a low level. However, if the rats were cleared by trapping or poisoning, ferrets were domesticated at least by 500 AD in Europe, being used as mousers. Mongooses have been introduced into homes to control rodents and snakes, biological pest control is the control of one through the control and management of natural predators and parasites. For example, mosquitoes are often controlled by putting Bt Bacillus thuringiensis ssp. israelensis, the treatment has no known negative consequences on the remaining ecology and is safe for humans to drink
10.
.45 Colt
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The.45 Colt or.45 Long Colt cartridge is a handgun cartridge dating to 1872. It is a black-powder revolver round developed for the Colt Single Action Army revolver and this cartridge was adopted by the U. S. Army in 1873 and served as an official US military handgun cartridge for 14 years. Colt began work on the revolver in 1871, and submitted a sample to the U. S. Army in late 1872, the revolver was accepted for purchase in 1873. The cartridge is an inside lubricated type, the rebated heel type bullet design of its predecessor, the.44 Colt, was eliminated, since it was an outside lubricated type, which would pick up dirt and grit during handling. The.45 Colt replaced the.50 caliber Model 1871 Remington single shot pistol, while the Colt remained popular, the Smith & Wesson M1875 Army Schofield Revolver was approved as an alternate which created a logistic problem for the Army. Adoption of the.45 M1887 Military Ball Cartridge resolved the Armys ammunition logistic problems, the M1887 Govt round was replaced by the.38 Long Colt in 1892. In 1909, the.45 M1909 round was issued along with the.45 Colt New Service revolver and this round was never loaded commercially, and is almost identical to the original.45 Colt round, except having a larger diameter rim. The rim is large enough that it cannot be loaded in adjacent chambers in the rod-ejector Colt model, the.45 Colt remains popular with renewed interest in Cowboy Action Shooting. The modern.45 Colt bullet has changed as well, and it is now.451 inches in diameter for jacketed bullets, the.45 Colt became the basis for other rounds, such as the.454 Casull. The.45 Colt originally was a cartridge, but modern loadings use smokeless powder. The original black-powder loads called for 28 to 40 grains of powder behind a 230-to-255-grain lead bullet. These loads developed muzzle velocities of up to 1,050 ft/s, because of this power and its excellent accuracy, the.45 Colt was the most-used cartridge at the time of its introduction, succeeding the.44 WCF. The.45 Colt at that time did not enjoy the. 44-40s advantage of a Winchester rifle chambered for it, the rumor was that early.45 Colt cartridges had a very minimal rim, and would not eject reliably. Currently manufactured brass has a rim of adequate diameter for such uses, modern Winchesters, Marlins and replicas have remedied this omission almost 100 years after the fact, and the.45 Colt is now available in modern lever-action rifles. While this has one of numerous arguments to explain the lack of a rifle chambered in.45 Colt, in fact. It required the expiration of those original patents for the.45 Colt to become available in a rifle, todays standard factory loads develop around 400 ft·lbf of muzzle energy at about 860 ft/s, making it roughly equivalent to modern.45 ACP loads. There are Cowboy Action Shooting loads which develop muzzle velocities of around 750 ft/s, cartridges of the World states that.45 Colt should never be loaded to more than 800 fps. Some handloads and factory manufactured cartridges put this round in the class as the.44 Magnum using special revolvers
11.
Mossberg 500
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Mossberg 500 is a series of pump action shotguns manufactured by O. F. Model numbers included in the 500 series are the 500,505,510,535, introduced in 1960, all model 500s are based on the same basic concept designed by Carl Benson. A single large locking lug is used to secure the breech, the magazine tube is located below the barrel, and is screwed into the receiver. The slide release is located to the rear of the trigger guard. Sights vary from model to model, from simple bead sight to a receiver mounted ghost ring or a base for a telescopic sight. Most models come with the receiver drilled and tapped for the installation of a sight or a scope base. The factory scope base is attached to the barrel via a cantilever-type mount, intended for use in harsh and dirty conditions, such as waterfowl hunting or combat, the Model 500 series is designed to be easy to clean and maintain. All Model 500s feature interchangeable barrels, which may be removed without the use of tools, by loosening a screw on the end of the magazine tube, allowing the barrel to be removed. The Model 500s bolt locks into a recess located on the top of the barrel instead of the receiver itself. The trigger housing and safety button are made of plastic to reduce cost, the trigger assembly, which includes the trigger, hammer, sear, and trigger body with guard, can be removed by pushing out one retaining pin and pulling downwards on the guard. The elevator can be removed by putting the gun on safety and squeezing the sides together, the fore-end can then be moved to the rear, allowing the bolt and bolt carrier to drop out, and then the forend can be removed by moving it forward. The cartridge stop and interrupter will then free, leaving just the ejector. The magazine spring and follower may be removed by unscrewing the tube from the receiver and this level of field stripping is sufficient to allow all components to be cleaned. The name Model 500 covers an entire family of pump shotguns designed to chamber 3-inch magnum shells, the standard model holds five 2. 75-inch or five 3-inch shells in the magazine and one in the chamber. The Model 500 is available in 12 gauge,20 gauge, a 16 gauge was offered at one time but has been discontinued. The standard finish for the Model 500 is an aluminum alloy receiver. Some models come with a matte black matte-anodized receiver, and a blued barrel. Some 500 models are anodized to look parkerized, with parkerized barrels and this is also true of the 590 series since an aluminum receiver cannot be parkerized
12.
Combination gun
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A combination gun is a break-action hunting firearm that comprises at least one rifled barrel and one shotgun barrel. Combination guns using one rifle and one shotgun barrel usually are in an over and under configuration, side-by-side versions are referred to as cape guns. A drilling is a gun that has three barrels. Combination guns generally use rimmed cartridges, as rimless cartridges are difficult to extract from a break-action weapon. Combination guns have a history in Europe, Africa, and Asia. These guns are almost exclusively hunting arms, as a result, they are popular with gamekeepers who often need the flexibility of the combination gun during their normal duties. The earliest combination guns were called swivel guns, which used a set of barrels designed to rotate to either the rifled or smooth-bore barrel to line up with a flintlock mechanism. Modern combination guns tend to resemble double-barreled shotguns and double rifles, combination guns generally have a selector that allows the user to choose which barrel will fire. Drillings with two barrels and one rifle barrel may have two triggers, one for each shotgun barrel, and a selector that will allow one trigger to fire the rifle barrel. Four-barrel versions known as Vierlings generally have two triggers, and selectors to switch each between shotgun and rifle, combination guns are over/under designs, usually with a shotgun barrel over a rifle barrel. Iron sights are used for aiming the rifle, and the front sight alone is sufficient to point the shotgun. Scope mounts are available, sometimes with a cutout for aiming the shotgun barrels, however, the thinness of the shotgun barrels that are usually on top make the scope mounting awkward. An interesting combination gun is the Ithaca M6 Aircrew Survival Weapon and a civilian version Springfield Armory M6 Scout, a cape gun is a side-by-side version of a combination gun, and is typically European in origin. These were at one time popular in southern Africa where a variety of game could be encountered. British versions are chambered for the.303 British service cartridge. German and Austrian cape guns have the barrel on the right side. The front trigger is usually a set trigger as well, the German and Austrian versions are commonly chambered in 9. 3×74mmR and 16-gauge, although they were chambered in a wide variety of rifle and shotgun cartridges. The most common layout was a shotgun with a centerfire rifle barrel centered on the bottom
