1.
Gun barrel
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A gun barrel is a part of firearms and artillery pieces. The hollow interior of the barrel is called the bore, a gun barrel must be able to hold in the expanding gas produced by the propellants to ensure that optimum muzzle velocity is attained by the projectile as it is being pushed out by the expanding gas. Modern small arms barrels are made of known and tested to withstand the pressures involved. Artillery pieces are made by various techniques providing reliably sufficient strength, early firearms were muzzle-loading, with powder, and then shot loaded from the muzzle, capable of only a low rate of fire. During the 19th century effective mechanical locks were invented that sealed a breech-loading weapon against the escape of propellant gases, the early Chinese, the inventors of gunpowder, used bamboo, a naturally tubular stalk, as the first barrels in gunpowder projectile weapons. Early European guns were made of iron, usually with several strengthening bands of the metal wrapped around circular wrought iron rings. The Chinese were the first to master cast-iron cannon barrels, early cannon barrels were very thick for their caliber. Bore evacuator Bore snake Cannon Muzzle Polygonal rifling Rifling Slug barrel Smoothbore
2.
Cartridge (firearms)
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Military and commercial producers continue to pursue the goal of caseless ammunition. A cartridge without a bullet is called a blank, One that is completely inert is called a dummy. Some artillery ammunition uses the same concept as found in small arms. In other cases, the shell is separate from the propellant charge. In popular use, the bullet is often misused to refer to a complete cartridge. The cartridge case seals a firing chamber in all directions excepting the bore, a firing pin strikes the primer and ignites it. The primer compound deflagrates, it does not detonate, a jet of burning gas from the primer ignites the propellant. Gases from the burning powder pressurize and expand the case to seal it against the chamber wall and these propellant gases push on the bullet base. In response to pressure, the bullet will move in the path of least resistance which is down the bore of the barrel. After the bullet leaves the barrel, the pressure drops to atmospheric pressure. The case, which had been expanded by chamber pressure. This eases removal of the case from the chamber, brass is a commonly used case material because it is resistant to corrosion. A brass case head can be work-hardened to withstand the pressures of cartridges. The neck and body portion of a case is easily annealed to make the case ductile enough to allow reforming so that it can be reloaded many times. Steel is used in some plinking ammunition, as well as in military ammunition. Steel is less expensive than brass, but it is not feasible to reload, Military forces typically consider small arms cartridge cases to be disposable, one-time-use devices. However, case weight affects how much ammunition a soldier can carry, conversely, steel is more susceptible to contamination and damage so all such cases are varnished or otherwise sealed against the elements. One downside caused by the strength of steel in the neck of these cases is that propellant gas can blow back past the neck
3.
.40 S&W
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The.40 S&W is a rimless pistol cartridge developed jointly by major American firearms manufacturers Smith & Wesson and Winchester. It uses 0. 40-inch diameter bullets ranging in weight from 105 to 200 grains, the semi-automatic pistol offered two advantages over the revolver, 1) increased ammunition capacity and 2) increased ease of reloading during a firefight. The FBI was satisfied with the performance of its.38 Special +P158 gr L. S. W. C. H. P, cartridge based on decades of dependable performance. Ammunition for the new semi-automatic pistol had to deliver terminal performance equal or superior to the.38 Special FBI Load, during tests of the 9×19mm and. During this collaboration with the FBI, S&W realized that downsizing the 10mm full power to meet the FBI medium velocity specification meant less powder, S&W then teamed with Winchester to produce a new cartridge, the.40 S&W. It uses a small pistol primer whereas the 10mm cartridge uses a large pistol primer, the.40 S&W cartridge debuted January 17,1990, along with the new Smith & Wesson Model 4006 pistol, although it was several months before the pistols were available for purchase. Beat Smith & Wesson to the shelves in 1990, with pistols chambered in.40 S&W which were announced a week before the 4006. Glocks rapid introduction was aided by its engineering of a pistol chambered in 10mm Auto, since the.40 S&W uses the same bore diameter and case head as the 10mm Auto, it was merely a matter of adapting the 10mm design to the shorter 9×19mm Parabellum frames. The new guns and ammunition were an immediate success, the.40 S&W case length and overall cartridge length are shortened, but other dimensions except case web and wall thickness remain identical to the 10mm Auto. Both cartridges headspace on the mouth of the case, thus in a semi-auto they are not interchangeable. Fired from a 10mm semi-auto, the.40 Smith & Wesson cartridge will headspace on the extractor, if the cartridge is not held by the extractor, the chances for a ruptured primer are great. Smith & Wesson does make a double-action revolver that can fire either at will using moon clips, a single-action revolver in the. 38–40 chambering can also be modified to fire the.40 or the 10mm if it has an extra cylinder. Some.40 caliber handguns can be converted to 9mm with a purpose made barrel, magazine change. The.40 S&W has 1.25 ml cartridge case capacity. The common rifling twist rate for this cartridge is 406 millimetres,6 grooves, ∅ lands =9.91, mm, ∅ grooves =10.17 mm, land width =3.05 mm and the primer type is small pistol. Guidelines, the.40 S&W case can handle up to 225 megapascals piezo pressure, in C. I. P. -regulated countries every pistol/cartridge combo has to be proofed at 130% of this maximum C. I. P. pressure to certify for sale to consumers. The SAAMI pressure limit for the.40 S&W is set at 241.32 megapascals piezo pressure, the.40 S&W cartridge has been popular with law enforcement agencies in the United States, Canada, and Australia. Marshall & Sanow contend that with good jacketed hollow point bullets, apart from the imperfect relationship between ordnance gelatin ballistics and actual stopping power, critics pointed to the reduced power of the round compared with the 10mm Auto it was based on
4.
Action (firearms)
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In firearms terminology, an action is the mechanism that handles the ammunition or the method by which that mechanism works. Breech-loading weapons have actions, actions are not present on muzzleloaders. The mechanism that fires a muzzle-loader is called the lock, actions can be categorized in several ways, including single action versus double action, break action versus bolt action, and others. The term action can also short, long, and magnum if it is in reference to the length of the rifle’s receiver. The short action rifle usually can accommodate a cartridge length of 2.8 in or smaller, the long action rifle can accommodate a cartridge of 3.34 in, and the magnum action rifle can accommodate cartridges of 3.6 in, or longer in length. Manual operation is a term describing any type of firearm action that is loaded one shot at a time by the user rather than automatically. For example, break action is a form of operation using a simple hinge mechanism that is manually unlatched by the operator. These are actions wherein the breechblock lowers or drops into the receiver to open the breech, there are two principal types of dropping block, the tilting block and the falling block. In a tilting or pivoting block action, the breechblock is hinged on a pin mounted at the rear, when the lever is operated, the block tilts down and forward, exposing the chamber. The best-known pivoting block designs are the Peabody, the Peabody–Martini, the original Peabody rifles, manufactured by the Providence Tool Company, used a manually cocked side-hammer. The 1871 Martini–Henry which replaced the trapdoor Snider–Enfield was the standard British Army rifle of the later Victorian era, charles H. Ballards self-cocking tilting-block action was produced by the Marlin Firearms Company from 1875, and earned a superlative reputation among long-range Creedmoor target shooters. Surviving Marlin Ballards are today highly prized by collectors, especially those mounted in the elaborate Swiss-style Schützen stocks of the day. A falling-block action is a firearm action in which a solid metal breechblock slides vertically in grooves cut into the breech of the weapon. Examples of firearms using the falling block action are the Sharps rifle, in a rolling block action the breechblock takes the form of a part-cylinder, with a pivot pin through its axis. The operator rotates or rolls the block to open and close the breech, it is a simple, rugged, a break action is a type of firearm where the barrel are hinged and can be broken open to expose the breech. The earliest metallic-cartridge breechloaders designed for military issue began as conversions of muzzle-loading rifle-muskets. The upper rear portion of the barrel was filed or milled away, an internal angled firing pin allowed the re-use of the rifles existing side-hammer. The Allin action made by Springfield Arsenal in the US hinged forward, france countered in 1866 with its superior Chassepot rifle, also a paper-cartridge bolt action
5.
Magazine (firearms)
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A magazine is an ammunition storage and feeding device within or attached to a repeating firearm. Magazines can be removable or integral to the firearm, the magazine functions by moving the cartridges stored in the magazine into a position where they may be loaded into the chamber by the action of the firearm. The detachable magazine is often referred to as a clip, although this is technically inaccurate, magazines come in many shapes and sizes, from those of bolt-action express rifles that hold only a few rounds to drum magazines for self-loading rifles that can hold one hundred rounds or more. Various jurisdictions ban what they define as high-capacity magazines, with the increased use of semi-automatic and automatic firearms, the detachable box magazine became increasingly common. Soon after the adoption of the M1911 pistol, the magazine was settled on by the military and firearms experts. The defining difference between clips and magazines is the presence of a mechanism in a magazine, typically a spring-loaded follower. Use of the clip to refer to detachable magazines is a point of strong disagreement. The first mass-produced repeater was the Volcanic Rifle which used a bullet with the base filled with powder and primer fed into the chamber from a spring-loaded tube called a magazine. It was named after a building or room used to store ammunition, the anemic power of the Rocket Ball ammunition used in the Volcanic doomed it to limited popularity. The Henry repeating rifle is a lever-action, breech-loading, tubular magazine fed rifle, designed by Benjamin Tyler Henry in 1860, it was one of the first firearms to use self-contained metallic cartridges. The Henry was introduced in the early 1860s and produced through 1866 in the United States by the New Haven Arms Company and it was adopted in small quantities by the Union in the Civil War and favored for its greater firepower than the standard issue carbine. Many later found their way West and was famed both for its use at the Battle of the Little Bighorn, and being the basis for the iconic Winchester rifle which are made to this day. The Henry and Winchester rifles would go on to see service with a number of militaries including Turkey, switzerland and Italy adopted similar designs. The first magazine-fed firearm to achieve success was the Spencer repeating rifle. The Spencer used a magazine located in the butt of the gun instead of under the barrel. The Spencer was successful, but the rimfire ammunition did occasionally ignite in the magazine tube and it could also injure the user. The new bolt-action rifles began to favor with militaries in the 1880s and were often equipped with tubular magazines. The Mauser Model 1871 was originally a single-shot action that added a magazine in its 1884 update
6.
Semi-automatic pistol
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One cartridge is fired each time the trigger of a semi-automatic pistol is pulled, the pistols disconnector ensures this behavior. Additional terms sometimes used as synonyms for a semi-automatic pistol are automatic pistol, self-loading pistol, autopistol, a semi-automatic pistol harnesses the energy of one shot to reload the chamber for the next. After a round is fired, the spent casing is ejected, most pistols use recoil operation to do this, but some pistols use blowback or gas operation. Most types of semi-automatic pistols rely on a magazine to store ammunition before it is fired. Typically, the first round is loaded into the chamber by pulling back. This is called racking the slide or racking the gun, after the trigger is pulled and the round is fired, the recoil operation of the handgun automatically extracts and ejects the shell casing and reloads the chamber. This mode of operation allows for faster reloading and storing a larger number of cartridges than a revolver. Each pull of the trigger on a DAO semi-automatic pistol requires the amount of pressure. The Kel-Tec P-32 is an example of a DAO action, DAO semi-automatic pistols are most generally recommended only in the smaller, self-defense, concealable pistols, rather than in target or hunting pistols. A notable exception is Glock-brand pistols which optimize preset triggers, and this allows for significantly shorter trigger pulls than DAO. The trigger spring can be replaced with a one and paired with a low-strength sear connector resulting in lightened trigger pulls to improve a shooters accuracy. Standard modern semi-automatic pistols are double action, also sometimes known as double-action/single-action. In this design, the hammer or striker may be either thumb-cocked or activated by pulling the trigger when firing the first shot, the hammer or striker is recocked automatically during each firing cycle. In double-action pistols, the first pull of the trigger requires roughly twice as much pressure as subsequent firings, the Beretta 92F/FS, a full-sized, service, semi-automatic pistol is an example of this style of action. A common mode of carry for DA semi-automatic pistols is with the full, a round chambered. In contrast, a single-action semi-automatic pistol must be cocked by first operating the slide or bolt, or, if a round is already chambered, the famed Colt M1911 is an example of this style of action. All SA semi-automatic pistols exhibit this feature, and automatically cock the hammer when the slide is first racked to chamber a round, a round can also be manually inserted in the chamber with the slide locked back. Then the safety can be applied, the normal mode of carrying an SA semi-automatic pistol is condition 1, popularly known as cocked and locked
7.
Smith & Wesson
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Smith & Wesson is a manufacturer of firearms in the United States. The corporate headquarters are based in Springfield, Massachusetts, founded in 1852, Smith & Wessons pistols and revolvers have become standard issue to police and armed forces throughout the world, in addition to their popularity among sport shooters. Apart from firearms, Smith & Wesson has been known for the types of ammunition it has introduced over the years. Wesson founded the Smith & Wesson Company in Norwich, Connecticut in 1852 to develop the Volcanic rifle, Smith developed a new Volcanic Cartridge, which he patented in 1854. The Smith & Wesson Company was renamed Volcanic Repeating Arms in 1855, Smith left the company and returned to his native Springfield, Massachusetts, Wesson stayed on as plant manager with Volcanic Repeating Arms. As Samuel Colts patent on the revolver was set to expire in 1856 and his research pointed out that a former Colt employee named Rollin White held the patent for a Bored-through cylinder, a component he would need for his invention. Wesson reconnected with Smith and the two partners approached White to manufacture a newly designed revolver-and-cartridge combination, rather than make White a partner in their company, Smith and Wesson paid him a royalty of $0.25 on every revolver that they made. It would become Whites responsibility to defend his patent in any court cases which led to his financial ruin. The orders for the Smith & Wesson Model 1 revolver outpaced the production capabilities. In 1860 demand was so great that Smith & Wesson expanded into a new facility, at the same time, the companys design was being infringed upon by other manufacturers which led to numerous lawsuits filed by Rollin White. In many of these part of the restitution came in the form of the offender being forced to stamp Manufactured for Smith & Wesson on the revolvers in question. Whites vigorous defense of his patent caused a problem for armsmakers in the United States at the time as they could not manufacture cartridge revolvers, at the end of the war the US Government charged White with causing the retardation of arms development in America. Demand for revolvers declined at the close of the Civil War, in 1870 the company introduced a large frame revolver in heavier calibers than the pocket sized revolvers it had been making. The design was known as the Smith & Wesson Model 3, after an organized campaign by the NRA and NSSF, thousands of retailers and tens of thousands of firearms consumers boycotted Smith & Wesson. On 11 May 2001, Saf-T-Hammer Corporation acquired Smith & Wesson Corp. from Tomkins plc for US$15 million, Saf-T-Hammer assumed US$30 million in debt, bringing the total purchase price to US$45 million. The acquisition of Smith & Wesson was chiefly brokered by Saf-T-Hammer President Bob Scott, after the purchase, Scott became the president of Smith & Wesson to guide the 157-year-old company back to its former standing in the market. On 15 February 2002, the name of the newly formed entity was changed to Smith & Wesson Holding Corporation, about 2006 Smith & Wesson refocused its marketing on big box retailers, according to Smith & Wesson CEO Mike Golden in a 2008 conference call with investors. In December 2014, Smith & Wesson Holding announced it was paying $130.5 million for Battenfeld Technologies, the company made the acquisition with the eventual intent to merge all its existing Smith & Wesson, M&P and Thompson Center Arms accessories into a single division
8.
Safety (firearms)
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In firearms, a safety or safety catch is a mechanism used to help prevent the accidental discharge of a firearm, helping to ensure safer handling. Safeties can generally be divided into such as internal safeties. Sometimes these are called passive and active safeties, respectively, some firearms manufactured after the late 1990s include mandatory integral locking mechanisms that must be deactivated by a unique key before the gun can be fired. These integral locking mechanisms are intended as child-safety devices during unattended storage of the firearm—not as safety mechanisms while carrying, other devices in this category are trigger locks, bore locks, and gun safes. The most common form of safety mechanism is a switch, button or lever that, other designs may block the hammer or striker from forward movement or act as a block to prevent them from contacting the firing pin. The M1911 design is an example of a handgun with a grip safety. The Uzi submachine gun is another example of a firearm with a grip safety, a related grip-type safety is the decocking grip found on some H&K pistols like the P7 Series. The firearm is cocked and ready to fire only when the front of the grip is squeezed by the operator. When the grip is released, the firearm is decocked, and the trigger will not cock the firearm, therefore it will not fire unless the grip is squeezed. Alternatively, the trigger can first be pulled and then it will fire when the grip is subsequently squeezed, finally, if both the grip is squeezed and the trigger pulled simultaneously, the pistol will fire. Another, unusual variant was found in the Ortgies semi-automatic pistols, to disengage the safety, a user would squeeze a lever until flush with the rear of the grip. Thus, engaging the safety also relieved some tension in the striker spring, as the Ortgies is a pocket pistol meant for personal defense, this feature eliminates the problem of failing to disengage the safety when one needs to shoot. Gripping the pistol tightly is all it takes to disengage the safety, most traditional semi-automatic double-action/single action pistols are designed to be carried with the hammer down on a chambered round, with or without a manual safety engaged. However, the act of cycling the action on such a firearm will leave the hammer cocked in single-action mode. To return the pistol to its state, it is necessary to uncock the hammer, usually by holding the hammer spur, carefully pulling the trigger. A decock/safety is a manual safety switch and decocking lever. A simpler two-way system was popularized by the Walther PP and is commonly seen on the Beretta 92. The SIG Sauer line of pistols, such as the SIG P226, the earliest use of a single-action decocker was the Vis wz.35 Radom redesign in 1932 to enable horsemen to safely holster their firearm with one hand
9.
Browning Hi-Power
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The Browning Hi Power is a single-action, semi-automatic handgun available in 9mm and.40 S&W calibers. It is based on a design by American firearms inventor John Browning, Browning died in 1926, several years before the design was finalized. The Hi-Power is one of the most widely used military pistols in history, the Hi Power name alludes to the 13-round magazine capacity, almost twice that of contemporary designs such as the Luger or Colt M1911. The pistol is often referred to as an HP or as a GP, the terms P-35 and HP-35 are also used, based on the introduction of the pistol in 1935. It is most often called the Hi Power, even in Belgium, other names include BAP, particularly in Irish Army service, or BHP. The Browning Hi-Power was designed in response to a French military requirement for a new service pistol and it was to accomplish all of this at a weight not exceeding 1 kg. FN commissioned John Browning to design a new military sidearm conforming to this specification, Browning built two different prototypes for the project in Utah and filed the patent for this pistol in the United States on June 28,1923, granted on February 22,1927. One was a blowback design, while the other was operated with a locked-breech recoil system. Both prototypes utilized the new staggered magazine design to increase capacity without increasing the pistols grip size or magazine length. The locked breech design was selected for development and testing. This model was striker-fired, and featured a magazine that held 16 rounds. The design was refined through several trials held by the Versailles Trial Commission and this version featured the removable barrel bushing and take down sequence of the Colt 1911. By 1931, the Browning Hi-Power design incorporated a shortened 13-round magazine, a curved rear grip strap, by 1934, the Hi-Power design was complete and ready to be produced. It was first adopted by Belgium for military service in 1935 as the Browning P-35, ultimately, France decided not to adopt the pistol, instead selecting the conceptually similar but lower-capacity Modèle 1935 pistol. The HP35 originally had a rounded, serrated hammer with a hole through it and this lighter hammer was harder to cock and had difficulty firing the harder Berdan-primed centerfire cartridges commonly used in Europe, often requiring a tightening of the hammer spring. This was replaced in 1972 by a hammer on both civilian and military models. However, the Browning Challenger and special variants of the Browning pistol still use the classic ring hammer, the Browning Hi-Power has undergone continuous refinement by FN since its introduction. The adjustable sights are available on commercial versions of the Hi-Power
