84-575: The Ruger Security-Six and its variants, the Service-Six and Speed-Six are a product line of double-action revolvers introduced in 1972 and manufactured until 1988 by Sturm, Ruger & Co. These revolvers were marketed to law enforcement duty issue , military, and civilian self-defense markets. As far back as 1966, Ruger designers Harry Sefried and Henry Into began working on the company's first double-action revolver. Despite being popular with civilians, founder Bill Ruger hoped to expand into
168-478: A cartridge seated within the gun barrel chamber . This is accomplished by actuating a striking device through a combination of mainspring (which stores elastic energy ), a trap mechanism that can hold the spring under tension , an intermediate mechanism to transmit the kinetic energy from the spring releasing, and a firing pin to eventually strike and ignite the primer. There are two primary types of striking mechanisms – hammer and striker . A hammer
252-502: A push-button -like thumb-actuated trigger design, and others like the Springfield Armory M6 Scout use a squeeze-bar trigger similar to the "ticklers" on medieval European crossbows . Although the word "trigger" technically implies the entire mechanism (known as the trigger group ), colloquially it is usually used to refer specifically to the trigger blade. Most firearm triggers are "single-action", meaning that
336-411: A quicker initiation of fire, but compromised by having a longer, heavier trigger pull, which can affect accuracy compared to the lighter, shorter trigger pull of a single-action fire. In a DA/SA semi-automatic pistol , the trigger mechanism functions identically to that of a DA revolver. However, this is combined with the ability of the pistol slide to automatically cock the hammer when firing. Thus,
420-555: A switch that initiates the operation of other non-shooting devices such as a trap , a power tool , or a quick release . A small amount of energy applied to the trigger leads to the release of much more energy. Most triggers use a small flattened lever (called the trigger blade ) depressed by the index finger , but some weapons such as the M2 Browning machine gun or the Iron Horse TOR ("thumb-operated receiver") use
504-654: A car, then car restorers and collectors consider those to be the OEM parts. Other-brand parts would be considered aftermarket, such as Champion spark plugs, DieHard batteries, Kinsler fuel injectors, and BMP engine blocks and heads. Many auto parts manufacturers sell parts through multiple channels, for example to car makers for installation during new-vehicle construction, to car makers for resale as automaker-branded replacement parts, and through general merchandising supply chains. Any given brand of part can be OEM on some vehicle models and aftermarket on others. Microsoft
588-477: A cartridge or loading the chamber, the hammer or striker will rest in a partially cocked position. The trigger serves the function of completing the cocking cycle and then releasing the striker or hammer. While technically two actions, it differs from a double-action trigger in that the trigger is not capable of fully cocking the striker or hammer. It differs from single-action in that if the striker or hammer were to release, it would generally not be capable of igniting
672-480: A company that produces parts and equipment that may be marketed by another manufacturer. However, the term is ambiguous, with several other common meanings. It sometimes means the maker of a system that includes other companies' subsystems, an end-product producer, an automotive part that is manufactured by the same company that produced the original part used in the automobile's assembly, or a value-added reseller . When referring to auto parts, OEM typically refers to
756-435: A degree of safety in the field compared to having a conventional, very light trigger. There are two types: single set and double set. Set triggers are most likely to be seen on customized weapons and competition rifles where a light trigger pull is beneficial to accuracy. A single set trigger is usually one trigger that may be fired with a conventional amount of trigger pull weight or may be "set" – usually by pushing forward on
840-498: A different requirement regarding installation media from Direct OEMs. While a clean retail media of Windows can be installed and activated on these devices with OEM keys (most commonly using the SLP key that's embedded in to the system firmware already), actual OEM recovery media that was created by the PC manufacturer (not system-builder, nor retail Windows versions) typically only works on
924-466: A lanyard ring to the butt and designating it the M108. It was to replace aging Smith & Wesson Model 10 for issuing to air crews and military police . The 9mm variant featured cylinder chambers bored to headspace the cartridge on the case mouth instead of the rim, using a patented spring moon clip to permit extraction of the fired case. These alterations allowed the rimless 9mm cartridge to be used in
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#17327811480941008-467: A manual safety that additionally may serve to decock the hammer. Some have a facility (generally a lever or button) to safely lower the hammer. As a disadvantage, these controls are often intermingled with other controls such as slide releases, magazine releases, take-down levers, takedown lever lock buttons, loaded chamber indicators, barrel tip-up levers, etc. These variables become confusing and require more complicated manuals-of-arms. One other disadvantage
1092-411: A noticeable spring resistance that can functionally mimic a two-stage trigger. The trigger break is named for the sudden loss of resistance when the sear reaches the point of release, which is described as resembling the breaking of rigid materials when the strength fails under stress . The actuation force required to overcome the sear resistance during the break is known as the trigger weight , which
1176-494: A now-defunct contractor. Most of these wood grips featured a diamond-shaped panel of pressed checkering, though smooth walnut grips with uncheckered panels were shipped with some commemorative models. Oversized walnut target/combat grips were also available as a factory option. During the 1980s, some of the Speed- and Service-Six models were also shipped with rubber Pachmayr grips containing the silver Ruger emblem. Another feature of
1260-466: A one-piece frame, rather than a removable sideplate, which lent them superior strength. The Ruger Redhawk, introduced in 1980 and also designed by Sefried, was a scaled-up and improved version of the Security-Six. The "six series" line enjoyed sales success because of their basic features, solid construction, and competitive pricing. Various models were issued by US government agencies as diverse as
1344-527: A police pistol. These weapons also generally lack any type of external safety. DAO is common among police agencies and for small, personal protection firearms. The primary drawback is that the additional trigger pull weight and travel required for each shot reduces accuracy. Pre-set triggers offer a balance of pull weight, trigger travel, safety, and consistency. Glock popularized this trigger in modern pistols and many other manufacturers have released pre-set striker products of their own. The primary disadvantage
1428-488: A result an external safety is sometimes employed. Double-action triggers provide the ability to fire the gun whether the hammer is cocked or uncocked. This feature is desirable for military, police, or self-defense pistols. The primary disadvantage of any double-action trigger is the extra length the trigger must be pulled and the extra weight required to overcome the spring tension of the hammer or striker. DA/SA pistols are versatile mechanisms. These firearms generally have
1512-603: A revolver design. Barrel length options for the Service-Six included 2.75 and 4 inches. The 9mm was also marketed under the designation M109. Incorporating fixed sights and a round-butt frame, and available in .357 Magnum, .38 Special, .38 S&W (.38-200), and 9mm Luger, the Speed-Six was intended for use by plainclothes detectives and others desiring a more concealable handgun. The .38 S&W variant (in England known as
1596-496: A single-action mechanism altogether, more commonly DAO revolvers are modifications of existing DA/SA models, with identical internals, only with access to the hammer prevented, either by covering it with a shroud or by removing the thumb spur. In both cases, the goal is to prevent the possible snagging of the hammer spur on clothing or holster. Due to the imposed limitation in accuracy, the majority of DAO revolvers have been short-barrel, close-range "snub" weapons, where rapidity of draw
1680-435: A variety of manufacturers ( Dell , HP , ASUS , Acer , Lenovo , Wistron , Inventec , Supermicro , Compal Electronics , Quanta Computer , Foxconn , Pegatron , Jabil , Flex , etc.). These OEMs commonly use a procedure known as System Locked Pre-installation , which pre-activates Windows on PCs that are to be sold via mass distribution. These OEMs also commonly bundle software that is not installed on stock Windows on
1764-426: A way to catch the hammer on release; while the other two have three-position safety selectors and a way to capture the hammer on release. In these triggers, the third position activates the pull and release mode, while the center selector position causes the trigger to only drop the hammer when pulled. A set trigger allows a shooter to have a greatly reduced trigger pull (the resistance of the trigger) while maintaining
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#17327811480941848-656: A while longer in some break-action shotguns and in dangerous game rifles, where the hunter did not want to rely on an unnecessarily complex or fragile weapon. While single-action revolvers never lost favor in the US right up until the birth of the semi-automatic pistol , double-action revolvers such as the Beaumont–Adams were designed in Europe before the American Civil War broke out and saw great popularity all through
1932-426: Is a pivoting metallic component subjected to spring tension so when released will swing forward to strike a firing pin like a mallet hitting a punch / chisel , which then relays the hammer impulse by moving forward rapidly along its longitudinal axis. A striker is essentially a firing pin directly loaded to a spring, eliminating the need to be struck by a separate hammer. The firing pin/striker then collides into
2016-471: Is a popular example of a company that issues its Windows operating systems for use by OEM computer manufacturers via the bundling of Microsoft Windows . OEM product keys are priced lower than their retail counterparts, especially as they are purchased in bulk quantities, although they use the same software as retail versions of Windows. They are primarily for PC manufacturer OEMs and system builders, and as such are typically sold in volume licensing deals to
2100-504: Is also known as traditional double-action (TDA), as the vast majority of modern "double-action" handguns (both revolvers and semi-automatic pistols ) use this type of trigger instead of "double-action only" (DAO). In simple terms, "double-action" refers to a trigger mechanism that both cocks the hammer and then releases the sear, thus performing two "acts", although it is supposed to describe doing both strictly with one trigger pull only. However, in practice most double-action guns feature
2184-412: Is essential and limited accuracy is already an acceptable compromise. The purpose of a DAO action in a semi-automatic is mostly to avoid the change in trigger pull between the first and subsequent shots that one experiences in a DA/SA pistol, while avoiding the perceived danger of carrying a cocked single-action handgun, although it also avoids having to carry a cocked and loaded pistol, or having to lower
2268-406: Is not always considered a bad thing by some shooters. An overtravel stop will arrest the motion of the trigger blade and prevent excessive movement. When user releases the trigger, and it travels to its resting position. On semiauto firearms the movement eventually passes by reset position where trigger-disconnector mechanism resets itself to its resting state, in which pulling the trigger releases
2352-497: Is popular on hunting rifles. A two-stage trigger is often called pressure trigger and is popular on competition rifles. Some fully adjustable triggers can be adjusted to function as either a single-stage or two-stage trigger by adjusting the takeup. Setting the takeup travel (also known as the first stage) to near zero essentially makes the trigger a single-stage trigger. Some single-stage triggers (e.g., Glock Safe Action trigger, Savage AccuTrigger ) have an integral safety with
2436-449: Is that pulling the trigger a second time after a failure to fire will not re-strike the primer. In normal handling of the firearm, this is not an issue; loading the gun requires that the slide be retracted, pre-setting the striker. Clearing a malfunction also usually involves retracting the slide following the " tap rack bang " procedure. Original equipment manufacturer An original equipment manufacturer ( OEM ) generally refers to
2520-430: Is that while a single-action revolver requires the user to manually cock the hammer before each firing, a single-action semi-automatic pistol only requires manual cocking for the first shot, after which the slide will reciprocate under recoil to automatically recock the hammer for a next shot, and is thus always cocked and ready unless the user manually decocks the hammer, encounters a misfiring cartridge , or pulls
2604-399: Is the difference between the first double-action pull and subsequent single-action pulls. DAO firearms resolve some DA/SA shortcomings by making every shot a double-action shot. Because there is no difference in pull weights, training and practice are simplified. Additionally, the heavier trigger pull can help to prevent a negligent discharge under stress. This is a particular advantage for
Ruger Security-Six - Misplaced Pages Continue
2688-426: Is the earliest and mechanically simplest of trigger types. It is called "single-action" because it performs the single function of releasing the hammer/striker (and nothing else), while the hammer/striker must be cocked by separate means. Almost all single-shot and repeating long arms (rifles, shotguns , submachine guns , machine guns, etc.) use this type of trigger. The "classic" single-action revolver of
2772-473: Is tied to the PC motherboard which it is initially installed on, and there is typically no transferring the key between PCs afterward. This is in contrast to retail keys, which may be transferred, provided they are only activated on one PC at a time. A significant hardware change will trigger a reactivation notice, just as with retail. Direct OEMs are officially held liable for things such as installation/recovery media, and as such were commonly provided until
2856-399: Is to rack the slide, clearing the round and recocking the hammer. While this can be advantageous in that many rounds will fire on being struck a second time, and it is faster to pull the trigger a second time than to cycle the action, if the round fails to fire on the second strike, the user will be forced to clear the round anyway, thus using up even more time than if they had simply done so in
2940-509: Is usually measured with a force gauge in newtons in SI units , or alternatively kilograms or grams in metric units, and pounds and/or ounces in US customary units . The break is often considered the most critical stage of the trigger pull for achieving good practical accuracy, since it happens just prior to the shot being discharged and can cause some unwanted shakes from the shooter's hand at
3024-669: The NYPD , the former Immigration and Naturalization Service , the Postal Service , the Border Patrol , and numerous police agencies. The Security-Six and its derivatives also became the standard issue service weapons of a large number of police departments, and many were exported overseas. While Ruger's Security-Six line has been out of production since 1988, a total of over 1.5 million revolvers were produced and they remain well-liked and respected, as well as highly sought after in
3108-558: The Smith & Wesson Centennial , the Type 26 Revolver , and the Enfield No. 2 Mk I* and Mk I** revolvers, in which there is no external hammer spur, or which simply lack the internal sear mechanism capable of holding the hammer in the cocked position. A double-action/single-action (DA/SA) trigger is a hybrid design combining the features of both single- and double-action mechanisms. It
3192-542: The Smith & Wesson Model 27 , S&W Model 60 , the Colt Police Positive , Colt Python , etc. Early double-action revolvers included the Beaumont–Adams and Tranter black-powder muzzleloaders . There are some revolvers that can only be fired in double-action mode (DAO), but that is almost always due to existing double-action/single-action models being modified so that the hammer cannot be cocked manually, rather than from weapons designed that way from
3276-411: The .357 Magnum cartridge, which also permitted the use of the shorter .38 Special cartridge. Ruger also chambered the Security-Six in .38 Special for some police orders by fitting different cylinders that could only accommodate the .38 Special cartridge. Barrel lengths available on the Security-Six included 2.75, 4, and 6 inches. After a few months of production, Ruger renamed the fixed-sight version of
3360-452: The .380 British or .38-200) was equipped with a military-style lanyard ring, and was sold to law enforcement organizations in India. The .357 Magnum, two and three quarter inch barreled version was the agency issue sidearm to Special Agents of the former Immigration and Naturalization Service , until the agency adopted a .40 caliber semiautomatic pistol in the mid 1990’s. The .357 Magnum version
3444-506: The Security-Six in the Ruger product line, but the Six line is still a very strong revolver, popular with shooters and collectors today. The Security-Six and its variants were more or less identical in basic design, with minor differences in sights (fixed or adjustable) and frame (round or square butt). Although medium- framed in size, the Security-Six was somewhat stronger than competing guns like
Ruger Security-Six - Misplaced Pages Continue
3528-542: The Security-Six revolvers were robustly designed with large, heavy-duty parts for durability and to allow for the investment casting process. Sefried had previously worked for High Standard Manufacturing Company, where he designed the High Standard Sentinel revolver. The grip profile of the Sentinel was reused on the "Six" line. Ruger's new revolvers were unlike other guns on the market in that they used
3612-431: The Security-Six the Service-Six or alternatively, the "Police Service-Six". This was largely a marketing decision and an attempt to capitalize on the lucrative law enforcement service revolver market. The Service-Six was normally chambered in .357 Magnum, though Ruger also built versions in .38 Special and 9mm Luger (Parabellum) for some police orders. The U.S. Military contracted for the fixed-sight .38 Special variant adding
3696-538: The Security-Six was straightforward disassembly, which required no tools with the exception of a flathead screwdriver, coin, or cartridge case rim used to remove the grip screw. Introduced in 1972, the Security-Six was the original model of the new series. The majority of these guns were manufactured with adjustable iron sights , although a few early models were sold with fixed sights. Security-Sixes could be ordered with either service or " target " (combat) -style square butt grips. Nearly all Security-Sixes were chambered for
3780-505: The Smith & Wesson Model 19 as the Ruger featured a thicker frame without a sideplate cutout, a stronger barrel shank support that prevented catastrophic barrel failure in the six-inch model revolvers, larger, stronger internal parts, and an increased diameter cylinder with offset bolt locking notches. The new revolvers were initially manufactured in a blued carbon steel finish; in 1975 stainless steel versions of all models were added to
3864-465: The break and is typically a short distance and can be considered an inertially accelerated motion caused by the residual push of the finger coupled with the sudden decrease in resistance after the trigger break. It can be a very critical factor for accuracy because shaking movements during this phase may precede the projectile leaving the barrel and is especially important with firearms with long barrels, slow projectiles and heavy trigger weights, where
3948-403: The cartridge primer positioned ahead of it, which contains shock-sensitive compounds (e.g., lead styphnate ) that sparks to ignite the propellant powder within the cartridge case and thus discharges the projectile . The trapping interface between the trigger and the hammer/striker is typically referred to as the sear surface. Variable mechanisms will have this surface directly on
4032-447: The cocked position when it is pulled to the rear and the trigger is not depressed. In a revolver , this means that simply squeezing the trigger when the hammer is lowered will both cock and release it. If the user uses their thumb to pull the hammer to the back, but does not press the trigger, the mechanism will lock the hammer in the cocked position until the trigger is pressed, just like a single action. Firing in double-action mode allows
4116-616: The factory. A release trigger releases the hammer or striker when the trigger is released by the shooter, rather than when it is pulled. A binary trigger is a trigger for a semiautomatic firearm that drops the hammer both when the trigger is pulled, and also when it is released. Examples include the AR-15 series of rifles, produced by Franklin Armory, Fostech Outdoors, and Liberty Gun Works. The AR-15 trigger as produced by Liberty Gun Works only functions in pull and release mode, and does not have
4200-421: The first place. The Taurus PT 24/7 Pro pistol (not to be confused with the first-generation 24/7 which was a traditional pre-set) offered this feature starting in 2006. The Walther P99 Anti-Stress is another example. A double-crescent trigger provides select fire capability without the need for a fire mode selector switch. Pressing the upper segment of the trigger produced semi-automatic fire, while holding
4284-496: The first shot, they would fire subsequent shots like a single-action pistol. These pistols rapidly gained popularity, and the traditional single-action-only pistols rapidly lost favor, although they still retain a dedicated following among enthusiasts. Today, a typical revolver or semi-automatic pistol is a DA/SA one, carried in double-action mode but firing most of its shots in single-action mode. A double-action trigger, also known as double-action only (DAO) to prevent confusion with
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#17327811480944368-481: The hammer from accidentally dropping, or a " decocker " – a lever that safely and gently drops the hammer (i.e. decocks the gun ) without fear of the gun firing. The latter is the more popular because, without a decocker, the user is forced to lower the hammer by hand onto a loaded chamber, with all of the attendant safety risks that involves, to return the gun to double-action mode. Revolvers almost never feature safeties, since they are traditionally carried un-cocked, and
4452-430: The hammer is manually lowered again. This gives the positive aspects of a single-action trigger without the need to carry "cocked and locked" (with a loaded chamber and cocked hammer), or with an empty chamber, which requires the user to chamber a round before firing. A potential drawback of a DA/SA weapon is that the shooter must be comfortable dealing with two different trigger pulls: the longer, heavier DA first pull and
4536-656: The hammer on a loaded chamber, if one only fires a partial magazine. A good example of this action in a semi-automatic is the SIG Sauer DAK trigger, or the DAO action of the Sig P250 . For striker-fired pistols such as the Taurus 24/7 , the striker will remain in the rest position through the entire reloading cycle. This term applies most often to semi-automatic handguns; however, the term can also apply to some revolvers such as
4620-493: The hammer or striker always rests in the down position until the trigger pull begins. With semi-automatics, this means that unlike DA/SA weapons, the hammer does not remain cocked after the first round is fired, and every shot is in double-action mode. With revolvers, this means that one does not have the option of cocking the gun before shooting and must always shoot it in double action mode. Although there have been revolvers that were designed with trigger mechanisms totally lacking
4704-684: The hammer requires the user to physically cock it prior to every shot; unlike a DA/SA gun, which cocks itself every time the slide is cycled. There are many examples of DA/SA semi-automatics, the Little Tom Pistol being the first, followed up by the Walther PPK and Walther P38 . Modern examples include weapons such as the Beretta 92 , among others. Almost all revolvers that are not specified as single-action models are capable of firing in both double- and single-action mode, for example,
4788-406: The images of Windows that will be deployed with their PCs (appropriate hardware drivers , anti-malware and maintenance software, various apps, etc.). Individuals may also purchase OEM "system-builder" licenses for personal use (to include virtual hardware ), or for sale/resale on PCs which they build. Per Microsoft's EULA regarding PC manufacturers and system-builder OEM licenses, the product key
4872-411: The instant of firing. Shooter preferences vary; some prefer a soft break with a smooth but discernible amount of trigger travel during firing, while others prefer a crisp break with a heavier weight and little or no discernible movement. A perceivably slow trigger break is often referred to as a "creep", and frequently described as an unfavorable feature. The trigger overtravel happens immediately after
4956-412: The late-2000s. These were phased out in favor of recovery partitions located on the primary storage drive of the PC (and available for order from the manufacturer upon request) for the user to repair or restore their systems to the factory state. This not only cut down on costs, but was also a consequence of the gradual obsolescence and phasing out of optical media from 2010 onward. System builders also have
5040-559: The latter half of the 19th century, with certain numbers being sold in the US as well. While many European and some American revolvers were designed as double-action models throughout the late 19th century, for the first half of the 20th century, all semi-automatic pistols were single-action weapons, requiring the weapon to be carried cocked and loaded with the safety on, or uncocked with an empty chamber ( Colt M1911 , Mauser C96 , Luger P.08 , Tokarev TT , Browning Hi-Power ). The difference between these weapons and single-action revolvers
5124-489: The law enforcement and private security markets, which were then dominated by rivals Smith & Wesson and Colt . The introduction of the Security-Six and its variants marked Sturm Ruger's first attempt to sell a custom double-action revolver, deviating from the corporation's earlier designs which were outdated Colt Peacemaker -style single-action revolvers. Ruger used investment casting for most parts in an effort to hold down production costs . As with all Ruger firearms,
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#17327811480945208-663: The lineup. Featuring six- round cylinders , the Security-Six series represented one of the first modern revolver designs to feature a hammer powered by a coil spring utilizing a transfer-bar firing system, and was chambered for a variety of centerfire ammunition cartridges including .38 Special and .357 Magnum , as well as .38 S&W and 9×19mm Parabellum (9mm Luger). All Security-Six series revolvers came with original equipment manufacturer (OEM) supplied service-style wooden grips . The wood grips were all manufactured for Ruger by W.F. Lett Manufacturing in New Hampshire,
5292-445: The lower segment of the trigger produced fully automatic fire. Though considered innovative at the time, the feature was eliminated on most firearms due to its complexity. Examples include MG 34 , Kulsprutegevär m/40 automatic rifle , M1946 Sieg automatic rifle , Osario Selectiva, and Star Model Z62 . A progressive , or staged trigger allows different firing rates based on how far it is depressed. For example, when pulled lightly,
5376-490: The manufacturer of the original equipment, that is, the parts which are then subsequently assembled and installed during the construction of a new vehicle. In contrast, aftermarket parts are those made by companies other than the OEM, which might be installed as replacements or enhancements after the car comes out of the factory. For example, if Ford used Autolite spark plugs , Exide batteries, Bosch fuel injectors , and Ford's own engine blocks and heads when building
5460-642: The mid-to-late 19th century includes black powder caplock muzzleloaders such as the Colt 1860 "Army" Model , and Colt 1851 "Navy" Model , and European models like the LeMat , as well as early metallic cartridge revolvers such as the Colt Model 1873 "Single Action Army" (named for its trigger mechanism) and Smith & Wesson Model 3 , all of which required a thumb to cock the hammer before firing. Single-action triggers with manually cocked external hammers lasted
5544-418: The more common hybrid DA/SA designs, is a trigger that must perform the double function of both cocking and releasing the hammer/striker. Such trigger design either has no internal sear mechanism capable of holding the hammer/striker in a still position (so cocking and releasing have to happen in one uninterrupted sequence), or has the whole hammer shrouded and/or with the thumb spur machined off, preventing
5628-408: The more significant resistance drop can make the trigger finger overshoot and shake in an uncontrolled fashion. Having some overtravel provides a "buffer zone" that prevents the shooter from "jerking the trigger", allowing the remnant pressing force from the finger to be dampened via a "follow-through" motion. Although a perceivable overtravel can be felt as adding to the "creep" of the trigger break, it
5712-415: The optional ability to cock the hammer separately, reducing the trigger to perform just one action. This is opposed to "double-action only" firearms, which completely lack the capability to fire in single-action mode. In a DA/SA trigger, the mechanism is designed with an internal sear that allows the trigger to both cock and release the hammer/striker when fully pulled, or to merely lock the hammer/striker in
5796-553: The primer. Examples of pre-set strikers are the Glock , Smith & Wesson M&P , Springfield Armory XD -S variant (only), Kahr Arms , FN FNS series and Ruger SR series pistols. This type of trigger mechanism is sometimes referred to as a Striker Fired Action or SFA. Examples of pre-set hammers are the Kel-Tec P-32 and Ruger LCP pistols. Pre-set hybrid triggers are similar to a DA/SA trigger in reverse. The first pull of
5880-494: The sear. The reset event does not occur in double action firearms and in full auto firearms. There are numerous types of trigger designs, typically categorized according to which functions the trigger is tasked to perform, a.k.a. the trigger action (not to be confused with the action of the whole firearm , which refers to all the components that help handle the cartridge, including the magazine , bolt , hammer and firing pin / striker , extractor and ejector in addition to
5964-472: The second-hand market due to their strength and reliability. In the early 1980s, Ruger commissioned a heavier duty upgrade of the Six line that could handle a "lifetime diet" of full-powered magnum loads, the GP100 , which featured a beefier frame and full under-lug barrel, stronger steels, a redesigned grip frame and, most notably, a triple-locking cylinder to give extra strength to the action. The GP100 replaced
6048-401: The set trigger, and then pulling the firing trigger. A double set, double phase trigger can be operated as a standard trigger if the set trigger is not pulled, or as a set trigger by first pulling the set trigger. Double set, double phase triggers offer the versatility of both a standard trigger and a set trigger. Pre-set strikers and hammers apply only to semi-automatic handguns. Upon firing
6132-433: The shorter, lighter subsequent SA pulls. The difference between these trigger pulls can affect the accuracy of the crucial first few shots in an emergency situation. Although there is little need for a safety on a DA/SA handgun when carrying it loaded with the hammer down, after the first shots are fired, the hammer will be cocked and the chamber loaded. Thus, most DA/SA guns either feature a conventional safety that prevents
6216-406: The shortest, lightest, and smoothest pull available. The pull is also consistent from shot to shot so no adjustments in technique are needed for proper accuracy. On a single-action revolver, for which the hammer must be manually cocked prior to firing, an added level of safety is present. On a semi-automatic, the hammer will be cocked and made ready to fire by the process of chambering a round, and as
6300-428: The trigger and hammer or have separate sears or other connecting parts. The trigger pull can be divided into three mechanical stages: When considering the practical accuracy of a firearm, the trigger takeup is often considered the least critical stage of the trigger pull. Often triggers are classified as either single-stage or two-stage based on the takeup. A single-stage trigger is often called direct trigger and
6384-399: The trigger is designed only for the single function of disengaging the sear , which allows for a spring -tensioned hammer / striker to be released. In "double-action" firearm designs, the trigger also performs the additional function of cocking the hammer – and there are many designs where the trigger is used for a range of other functions. Firearms use triggers to initiate the firing of
6468-409: The trigger is pre-set. If the striker or hammer fail to discharge the cartridge, the trigger may be pulled again and will operate as a double-action only (DAO) until the cartridge discharges or the malfunction is cleared. This allows the operator to attempt a second time to fire a cartridge after a misfire malfunction, as opposed to a single-action, in which the only thing to do if a round fails to fire
6552-448: The trigger on an empty chamber (for older weapons lacking "last round bolt hold open" feature). In the late 1930s and early 1940s, Walther introduced the first "double-action" (actually DA/SA hybrid) semi-automatic pistols, the PPK and P.38 models, which featured a revolver-style double-action trigger, allowing the weapon to be carried with a round chambered and the hammer lowered. After
6636-434: The trigger). While a trigger is primarily designed to set off a shot by releasing the hammer/striker, it may also perform additional functions such as cocking (loading against a spring) the hammer/striker, rotating a revolver 's cylinder , deactivating internal safeties , transitioning between different firing modes (see progressive trigger ), or reducing the pull weight (see set trigger ). A single-action (SA) trigger
6720-514: The trigger, or by pushing forward on a small lever attached to the rear of the trigger. This takes up the trigger slack (or "take-up") in the trigger and allows for a much lighter trigger pull. This is colloquially known as a hair trigger . A double set trigger achieves the same result, but uses two triggers: one sets the trigger and the other fires the weapon. Double set triggers can be further classified into two different phases. A double set, single phase trigger can only be operated by first pulling
6804-418: The user from manipulating it separately. This design requires a trigger pull to both cock and trip the hammer/striker for every single shot, unlike a DA/SA, which only requires a double-action trigger pull for the first shot (or a typical DA/SA revolver, which can fire single action any time the user wishes but uses double-action as a default). This means that there is no single-action function for any shot, and
6888-416: The weapon can be carried with the hammer down on a loaded chamber, reducing perceived danger of carrying a single-action semi-automatic. When the user is ready to fire, simply pulling the trigger will cock and release the hammer in double action mode. When the weapon fires, the cycling slide automatically cocks the hammer to the rear, meaning that the rest of the shots fired will be in single-action mode, unless
6972-416: The weapon will fire a single shot. When depressed further, the weapon fires at a fully automatic rate. Examples include FN P90 , Jatimatic , CZ Model 25 , PM-63 , BXP , F1 submachine gun , Vigneron submachine gun , Wimmersperg Spz-kr , and Steyr AUG . Each trigger mechanism has its own merits. Historically, the first type of trigger was the single-action. This is the simplest mechanism and generally
7056-618: Was standard issue for the Royal Ulster Constabulary , who, unlike most police officers in the United Kingdom, were routinely armed, but was phased out in 2003 and replaced by the Glock 17 , with 15 examples continuing to be issued as duty weapons in 2012. Trigger (firearms)#Double-action A trigger is a mechanism that actuates the function of a ranged weapon such as a firearm , airgun , crossbow , or speargun . The word may also be used to describe
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