A diopter sight is an aperture sight component used to assist the aiming of ranged weapons, mainly firearms, airguns, and crossbows. Diopters function to precisely align the shooter's eye with the front sight and the target, while also producing beneficial optical effects for accurate aiming. A diopter must be paired with a complementing front sight element to obtain a usable sighting line. Diopter sights used for modern target shooting allow for very fine windage and elevation adjustments, moving the impact point on the order of less than five millimeters at a range of 100 metres. High end diopters typically accept accessories to aid the shooter's ability to see the target clearly.
69-507: The SSG 69 ( S charf s chützen g ewehr 69 , literally Sharpshooter Rifle 69) is a bolt-action sniper rifle produced by Steyr Mannlicher that serves as the standard sniper rifle for the Austrian Army . Designed as a sniper system to replace the SSG 98k sniper rifle (modified and accurized surplus Karabiner 98k rifles) and adopted in 1969 (hence the designation), it was ahead of its time with
138-460: A "cock on open" system. Although this bolt system has been rarely used in commercial sporting rifles (the Vostok brand target rifles being the most recognized) and has never been exported outside of Russia, although large numbers of military surplus Mosin–Nagant rifles have been sporterized for use as hunting rifles in the following years since the end of World War II. The Swing was developed in 1970 in
207-546: A bolt-action shotgun, albeit one designed to be attached to an M16 rifle or M4 carbine using an underbarrel mount (although with the standalone kit, the MASS can become a standalone weapon). Mossberg 12-gauge bolt-action shotguns were briefly popular in Australia after the 1997 changes to firearms laws , but the shotguns themselves were awkward to operate and had only a three-round magazine, thus offering no practical or real advantages over
276-410: A conventional double-barreled shotgun. Some pistols use a bolt-action system, although this is uncommon, and such examples are typically specialized hunting and target handguns. Most of the bolt-action designs use a rotating bolt (or "turn pull") design, which involves the shooter doing an upward "rotating" movement of the handle to unlock the bolt from the breech and cock the firing pin , followed by
345-435: A distance of 1 m (1.1 yd) in front of the rear sight. However, since the diopter hole is small, the aiming eye will be relatively well centered, and the parallax error will be relatively small in practice. There will be almost no parallax error if the eye and front globe sight are near perfectly centered through the diopter. In comparison, the parallax error on aperture sights with larger openings can increase quickly if
414-469: A firing mechanism without a hammer , but there are some hammer-fired models, such as the Merkel Helix. Firearms using a hammer usually have a comparably longer lock time than hammerless mechanisms. In the sport of biathlon , because shooting speed is an important performance factor and semi-automatic guns are illegal for race use, straight pull actions are quite common and are used almost exclusively in
483-580: A gravity-operated tubular magazine in the stock. Another more well-known bolt-action repeating rifle was the Vetterli rifle of 1867 and the first bolt-action repeating rifle to use centerfire cartridges was the weapon designed by the Viennese gunsmith Ferdinand Fruwirth in 1871. Ultimately, the military turned to bolt-action rifles using a box magazine ; the first of its kind was the M1885 Remington–Lee , but
552-607: A metallic cartridge's powder charge – were invented in the 1860s as well, the Berdan and the Boxer systems. The United States purchased 900 Greene rifles (an under hammer, percussion capped, single-shot bolt-action that used paper cartridges and an ogival bore rifling system) in 1857, which saw service at the Battle of Antietam in 1862, during the American Civil War ; however, this weapon
621-583: A rearward "pull" to open the breech, extract the spent cartridge case, then reverse the whole process to chamber the next cartridge and relock the breech. There are four major turn bolt-action designs: the Remington M-700 , possibly the single most numerous produced rifle in history which is now also used as basis for most custom competition rifle actions, along with the Mauser system, the Lee–Enfield system, and
690-471: A rotating bolt design. Johann Nicholas von Dreyse 's rifle of 1838 was accepted into service by Prussia in 1841, which was in turn developed into the Prussian Model in 1849. The design was a single shot breech-loader and had the now familiar arm sticking out from the side of the bolt, to turn and open the chamber . The entire reloading sequence was a more complex procedure than later designs, however, as
759-505: A separate bolthead that rotates with the bolt and the bearing lugs, in contrast to the Mauser system where the bolthead is a non-removable part of the bolt. The Mosin–Nagant is also unlike the Lee–Enfield system where the bolthead remains stationary and the bolt body itself rotates. The Mosin–Nagant bolt is a somewhat complicated affair, but is extremely rugged and durable; like the Mauser, it uses
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#1732852262344828-430: A single lethal shot from a safe distance. Target shooters favour single-shot bolt actions for their simplicity of design, reliability, and accuracy. Bolt-action shotguns are considered a rarity among modern firearms but were formerly a commonly used action for .410 entry-level shotguns, as well as for low-cost 12- gauge shotguns. The M26 Modular Accessory Shotgun System (MASS) is the most recent and advanced example of
897-529: A specific weapon's type of action. However, both straight pull and rotating bolt rifles are types of bolt-action rifles. Lever-action and pump-action weapons must still operate the bolt, but they are usually grouped separately from bolt-actions that are operated by a handle directly attached to a rotating bolt. Early bolt-action designs, such as the Dreyse needle gun and the Mauser Model 1871 , locked by dropping
966-757: A trigger derived from the Finnish Mantari, the Swing was commercially successful, with the basic design reused in the Paramount, RPA Quadlock and Millenium rifles. The Vetterli rifle was the first bolt-action repeating rifle introduced by an army. It was used by the Swiss army from 1869 to circa 1890. Modified Vetterlis were also used by the Italian Army . Another notable design is the Norwegian Krag–Jørgensen , which
1035-448: A vertically and horizontally (elevation and windage) adjustable occluder with a small hole (aperture), and is placed close in front of the shooter's aiming eye. Through this small hole the shooter can view the front sight component(s) and the intended target. The typical occluder used in target shooting diopters is a disc of about 25 mm (0.98 in) in diameter with a small hole in the middle. The small diopter viewing opening ensures
1104-442: Is achieved when looking through an aperture opening of approximately 1.2 mm (0.047 in) or less, and happens due to an optical phenomenon (edge effects) resulting in the light passing through being parallelized similar to how a collimated lens would. Because of this optical effect the front sight will also appear more steady, even though the shooter moves the head in a way such that the sighting eye moves sideways relative to
1173-587: Is beneficial for mounting aiming optics relatively low over the receiver, and the receiver is prepared to accept the bases of SSG (quick detach) optical sight mounts. The cold hammer forged barrel features a 304.8 mm (1 in 12 inch) twist rate to adequately stabilize the military 7.62×51mm NATO ammunition of the era. This twist rate is slow for optimally stabilizing not at the time available 7.62×51mm NATO sniping rounds loaded with 11.34-gram (175 gr) Hollow Point Boat Tail projectiles. The fiber glass reinforced ABS polymer stock features removable spacers to adjust
1242-515: Is that it is usually loaded by hand, one round at a time, although a box-like device was made that could drop five rounds into the magazine, all at once via a stripper or en bloc clip. This made it slower to reload than other designs which used stripper or en bloc clips. Another historically important bolt-action system was the Gras system, used on the French Mle 1874 Gras rifle , Mle 1886 Lebel rifle (which
1311-413: Is the straight-pull mechanism, where no upward handle-turning is needed and the bolt unlocks automatically when the handle is pulled rearwards by the user's hand. The first bolt-action rifle was produced in 1824 by Johann Nikolaus von Dreyse , following work on breechloading rifles that dated to the 18th century. Von Dreyse would perfect his Nadelgewehr (Needle Rifle) by 1836, and it was adopted by
1380-487: Is the most common bolt-action system in the world, being in use in nearly all modern hunting rifles and the majority of military bolt-action rifles until the middle of the 20th century. The Mauser system is stronger than that of the Lee–Enfield system, due to two locking lugs just behind the bolt head, which make it better able to handle higher-pressure cartridges (i.e. magnum cartridges ). The 9.3×64mm Brenneke and 8×68mm S magnum rifle cartridge "families" were designed for
1449-516: The Biathlon World Cup . The first company to make the straight pull action for .22 caliber was J. G. Anschütz ; Peter Fortner junior designed the "Fortner Action", which was incorporated into the Anschütz 1827 Fortner . The Fortner action is specifically the straight-pull ball bearing lock action, which features spring-loaded ball bearings on the side of the bolt which lock into a groove inside
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#17328522623441518-557: The Mosin–Nagant system. All four differ in the way the bolt fits into the receiver, how the bolt rotates as it is being operated, the number of locking lugs holding the bolt in place as the gun is fired, and whether the action is cocked on the opening of the bolt (as in both the Mauser system and the Mosin Nagant system) or the closing of the bolt (as in the Lee–Enfield system). The vast majority of modern bolt-action rifles were made for
1587-569: The Prussian Army in 1841. While it saw limited service in the German Revolutions of 1848 , it was not fielded widely until the 1864 victory over Denmark . In 1850 a metallic centerfire bolt-action breechloader was patented by Béatus Beringer. In 1852 another metallic centerfire bolt-action breechloader was patented by Joseph Needham and improved upon in 1862 with another patent. Two different systems for primers –the mechanism to ignite
1656-447: The firing pin had to be independently primed and activated, and the lever was used only to move the bolt. [REDACTED] Media related to Bolt action (firearms) at Wikimedia Commons Diopter sight Diopters are found in particular as rear sight elements on rifles . Diopter and globe sighting setups are commonly used in ISSF rifle shooting events . The diopter is in principle
1725-853: The rate of fire of the gun. In 1993, the German Blaser company introduced the Blaser R93 , a new straight pull action where locking is achieved by a series of concentric "claws" that protrude/retract from the bolthead, a design that is referred to as Radialbundverschluss ("radial connection"). As of 2017 the Rifle Shooter magazine listed its successor Blaser R8 as one of the three most popular straight pull rifles together with Merkel Helix and Browning Maral. Some other notable modern straight pull rifles are made by Beretta , C.G. Haenel , Chapuis , Heym , Lynx , Rößler , Savage Arms , Strasser, and Steel Action. Most straight bolt rifles have
1794-424: The striker within the bolt (either on opening or closing of the bolt depending on the gun design) and engages it against the sear . When the bolt is returned to the forward position, a new cartridge (if available) is pushed out of the magazine and into the barrel chamber , and finally the breech is closed tight by rotating the handle down so the bolt head relocks on the receiver. A less common bolt-action type
1863-522: The M10 and No 4 Mk IV rifles manufactured by Australian International Arms. Rifle Factory Ishapore of India manufactures a hunting and sporting rifle chambered in .315 which also employs the Lee Enfield action. The Mosin–Nagant action, created in 1891 and named after the designers Sergei Mosin and Léon Nagant , differs significantly from the Mauser and Lee–Enfield bolt-action designs. The Mosin–Nagant design has
1932-529: The Mauser M 98 bolt-action. A novel safety feature was the introduction of a third locking lug present at the rear of the bolt that normally did not lock the bolt, since it would introduce asymmetrical locking forces. The Mauser system features "cock on opening", meaning the upward rotation of the bolt when the rifle is opened cocks the action. A drawback of the Mauser M 98 system is that it cannot be cheaply mass-produced very easily. Many Mauser M 98-inspired derivatives feature technical alterations, such as omitting
2001-492: The SSG 69. The receiver and barrel were designed to provide maximum strength for minimum weight. For this the bolt action uses three pairs of rear-locking lugs (in common with the SMLE ), rather than the more common front-locking lugs. This, and the fact that it is only produced in the 'short action' length, limits the chambering to non-magnum calibres. The bolt opening angle of 60 degrees
2070-604: The United Kingdom as a purpose-built target rifle for use in NRA competition. Fullbore target rifle competitions historically used accurised examples of the prevailing service rifle, but it was felt these had reached the end of their development potential. The Swing bolt featured four lugs on the bolt head, at 45 degrees when closed - splitting the difference between the vertically locking Mauser and horizontally locking Enfield bolt designs. Supplied with Schultz & Larsen barrels and
2139-448: The aiming eye, while open sights have to be placed at least 30 cm away from the eye to in order to appear sharp. Typical modern target shooting diopters offer windage and elevation correction in increments of 2 to 4 mm (0.079 to 0.157 in) at 100 m (109.36 yd) (which equals 0.02 to 0.04 mrad or ≈ 0.069 to 0.172 MOA ). Some ISSF (Olympic) shooting events require this precision level for sight adjustment since
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2208-472: The bolt ahead of the lugs may flex on firing which, although a safety advantage with repeated firing over time, this may lead to a stretched receiver and excessive headspacing, which if perceived as a problem can be remedied by changing the removable bolt head to a larger sized one (the Lee–Enfield bolt manufacture involved a mass production method where at final assembly the bolt body was fitted with one of three standard size bolt heads for correct headspace ). In
2277-462: The bolt cocks the action. This enables a shooter to keep eyes on sights and targets uninterrupted when cycling the bolt. The ability of the bolt to flex between the lugs and chamber, which also keeps the shooter safer in case of a catastrophic chamber overpressure failure. The disadvantage of the rearward-located bolt lugs is that a larger part of the receiver, between chamber and lugs, must be made stronger and heavier to resist stretching forces. Also,
2346-462: The bolt handle or bolt guide rib into a notch in the receiver , this method is still used in .22 rimfire rifles. The most common locking method is a rotating bolt with two lugs on the bolt head, which was used by the Lebel Model 1886 rifle , Model 1888 Commission Rifle , Mauser M 98 , Mosin–Nagant and most bolt-action rifles. The Lee–Enfield has a lug and guide rib, which lock on the rear end of
2415-407: The bolt in addition to the linear motions to perform chambering and primary extraction . The bolt locking of a straight pull action is achieved differently without needing manual inputs, therefore the entire operating cycle needs the shooter to perform only two movements (pull back and push forward), instead of four movements (rotate up, pull back, push forward, and rotate down), this greatly increases
2484-432: The bolt in place. The operation can be done via a rotating bolt , a lever, cam action, a locking piece, or a number of systems. Straight pull designs have seen a great deal of use, though manual turn bolt designs are what is most commonly thought of in reference to a bolt-action design due to the type ubiquity. As a result, the bolt-action term is often reserved for more modern types of rotating bolt designs when talking about
2553-409: The bolt into the receiver. The bolt knob is the part of the bolt handle that the user grips when loading and reloading the firearm and thereby acts as a cocking handle . On many older firearms, the bolt knob is welded to the bolt handle, and as such becoming an integral part of the bolt handle itself. On many newer firearms, the bolt knob is instead threaded onto the handle, allowing the user to change
2622-420: The bolt's housing. With the new design came a new dry fire method; instead of the bolt being turned up slightly, the action is locked back to catch the firing pin. The action was later used in the centre-fire Heym SR 30 . Typically, the bolt consists of a tube of metal inside of which the firing mechanism is housed, and which has at the front or rear of the tube several metal knobs, or "lugs", which serve to lock
2691-473: The commercial market post-war, numbering in the tens of millions by Remington in the unique, and most accurate Model 700, two of the others use the Mauser system, with other designs such as the Lee–Enfield system and the Mosin Nagant system, of only limited usage. The Mauser bolt-action system is based on 19th-century Mauser bolt-action rifle designs and was finalized in the Gewehr 98 designed by Paul Mauser . It
2760-413: The design's inherent potential for superior accuracy and precision , as well as ruggedness and reliability compared to self-loading designs. Most bolt-action firearms use a rotating bolt operation, where the handle must first be rotated upward to unlock the bolt from the receiver , then pulled back to open the breech and allowing any spent cartridge case to be extracted and ejected. This also cocks
2829-410: The diopter. For maximum precision, there should still be a significant area of white visible around the bullseye and between the front and rear sight ring (if a front ring is being used). Since the best key to determining center is the amount of light passing through the apertures, a narrow, dim ring of light can actually be more difficult to work with than a larger, brighter ring. The precise sizes of
Steyr SSG 69 - Misplaced Pages Continue
2898-451: The existing bolt handle. These are often made of either rubber or plastic. Most bolt-action firearms are fed by an internal magazine loaded by hand, by en bloc , or by stripper clips , though a number of designs have had a detachable magazine or independent magazine, or even no magazine at all, thus requiring that each round be independently loaded. Generally, the magazine capacity is limited to between two and ten rounds, as it can permit
2967-413: The eye is not well centered in the rear sight. A parallax error of just 1 mm (0.039 in) at 1 m (1.1 yd) corresponds to an impact change of 10 cm (3.9 in) at 100 m (109.4 yd). A rear sight with a larger aperture than 1.2 mm (0.047 in) is not strictly a diopter sight, but nonetheless is still often (incorrectly) referred to as such. With larger aperture sights
3036-414: The faster rate of fire that all semi-automatic rifle alternatives allow. There are, however, many semi-automatic rifle designs used especially in the designated marksman role. Today, bolt-action rifles are chiefly used as hunting and target rifles. These rifles can be used to hunt anything from vermin to deer and to large game , especially big game caught on a safari , as they are adequate to deliver
3105-419: The firearm (as most users are right-handed ). The majority of bolt-action firearms are rifles , but there are also some variants of shotguns and handguns that are bolt-action. Bolt-action firearms are generally repeating firearms , but many single-shot designs are available particularly in shooting sports where single-shot firearms are mandated, such as most Olympic and ISSF rifle disciplines. From
3174-473: The first to be generally adopted was the British 1888 Lee–Metford . World War I marked the height of the bolt-action rifle's use, with all of the nations in that war fielding troops armed with various bolt-action designs. During the buildup prior to World War II , the military bolt-action rifle began to be superseded by semi-automatic rifles and later fully automatic rifles , though bolt-action rifles remained
3243-682: The late 19th century all the way through both World Wars , bolt-action rifles were the standard infantry service weapons for most of the world's military forces, with the exception of the United States Armed Forces , who used the M1 Garand Semi-automatic rifle . In modern military and law enforcement after the Second World War, bolt-action firearms have been largely replaced by semi-automatic and selective-fire firearms, and have remained only as sniper rifles due to
3312-402: The length of pull and an accessory rail on the forearm bottom for mounting a bipod. The choice for a synthetic stock was remarkable, as other sniper rifles at the time were still using wood stocks. The trigger is user adjustable for trigger weight and travel. The standard polycarbonate resin (branded as Makrolon by Bayer) detachable magazine features a 5-round rotary design that fits flush with
3381-461: The magazine to be flush with the bottom of the rifle, reduce the weight, or prevent mud and dirt from entering. A number of bolt-actions have a tube magazine , such as along the length of the barrel. In weapons other than large rifles, such as pistols and cannons , there were some manually operated breech-loading weapons. However, the Dreyse Needle fire rifle was the first breech loader to use
3450-560: The metallic cartridge bolt-action Gras rifle in 1874. European armies continued to develop bolt-action rifles through the latter half of the 19th century, first adopting tubular magazines as on the Kropatschek rifle and the Lebel rifle . The first bolt-action repeating rifle was patented in Britain in 1855 by an unidentified inventor through the patent agent Auguste Edouard Loradoux Bellford using
3519-402: The natural ability of the eye and brain to easily align concentric circles (circles all having a common centre). For optimal aiming and comfort the shooter should focus the aiming eye on the front sighting element. To avoid eye fatigue and improve balance the non-aiming eye should be kept open. The non-aiming eye can be blocked from seeing distractions by mounting a semi-transparent occluder to
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#17328522623443588-835: The original bolt knob for an aftermarket one, either for aesthetical reasons, achieving better grip or similar. The type of threads used vary between firearms. European firearms often use either M6 1 or M8 1.25 threads, for example M6 is used on the SIG Sauer 200 STR , Blaser R93 , Blaser R8 , CZ 457 and Bergara rifles, while M8 is used on the Sako TRG and SIG Sauer 404 . Many American firearms instead use 1/4" 28 TPI (6.35 0.907 mm) or 5/16" 24 TPI (7.9375 1.058 mm) threads. Some other thread types are also used, for example, No. 10 32 TPI (4.826 0.794 mm) as used by Mausingfield. There also exists aftermarket slip-on bolt handle covers which are mounted without having to remove
3657-454: The presence of back up iron sights and cosmetic differences like the stock colour, the only conspicuous anomaly being the SSG-PIV using a 409 mm barrel with a 254 mm (1 in 10 inches) twist designed to handle heavy subsonic ammunition in conjunction with a suppressor. The SSG action was used in the civilian SSG Match UIT international 300 m target rifle – the international shooting union
3726-469: The primary weapon of most of the combatants for the duration of the war; and many American units, especially the USMC , used bolt-action M1903 Springfield rifles until sufficient numbers of M1 Garand rifles were made available. The bolt-action is still common today among many sniper rifles , as the design has the potential for superior accuracy, reliability, reduced weight, and the ability to control loading over
3795-433: The rear sight. Also, the depth of field is increased so that both the sights and shooting target will appear sharp at the same time which further simplifies the aiming process. The parallax distance of a diopter sight is effectively adjusted to be the same as the sight distance. For example, with a distance of 1 m (1.1 yd) between the front and rear sight, the sighting system is effectively parallax adjusted to
3864-580: The score of the top competitors (last) shots series is expressed in tenths of scoring ring points. High-end target shooting diopters normally accept accessories like: The complementing front sight element may be a simple (hooded) bead or post for service arms, but is for target shooting more often a globe type sight , which consists of a hollow cylinder with a threaded cap, which allows interchangeable differently shaped front sight elements to be used. Most common are posts of varying widths and heights or rings or holes of varying diameter — these can be chosen by
3933-652: The shooter for the best fit to the target being used. Tinted transparent plastic insert elements may also be used, with a hole in the middle; these work the same way as an opaque ring, but provide a less obstructed view of the target. High end target front sight tunnels normally also accept accessories like adjustable aperture and optical systems to ensure optimal sighting conditions for match shooters. Some high end target sight line manufacturers also offer front sights with integrated aperture mechanisms. The use of round rear and front sighting elements for aiming at round targets, like used in ISSF match shooting, takes advantage of
4002-445: The shooter must make a conscious effort to center the eye in the rear sight for precise aiming. A true diopter sight (aperture below 1.2 mm) however has the advantage that the shooter does not have to concentrate on eye and rear sight alignment for precision aiming, and therefore the sighting process is reduced to only aligning the front sight to the target. Aperture sights (both diopter and non-diopter) require being placed close to
4071-462: The shooter's eye is very precisely and consistently centered behind the diopter sight. The diopter sight is easy to use and usually allows for very accurate aiming, because a relative long sighting line can be used. A long sighting line helps to reduce eventual angle errors and will, in case the sight has an incremental adjustment mechanism, adjust in smaller increments when compared to a further identical shorter sighting line. The "diopter sight effect"
4140-785: The similar Kahles ZF 84 10×42 telescopic sight was also offered. These optical sights on customer request can feature a Bullet Drop Compensating (BDC) elevation turret tuned for the ballistic trajectory of a particular gun- cartridge combination with a predefined projectile weight/type, muzzle velocity and air density at ranges. The ZF 69 sights BDC used by the Austrian military was calibrated from 100–800 m (109–875 yd) in 100 m (109 yd) increments up to 300 m (328 yd) and 50 m (55 yd) increments from 350 m (383 yd) upwards with 9.3-gram (143.5 gr) 7.62×51mm NATO ammunition . There were several SSG variants made with differences in barrel diameter and
4209-488: The stock, although a 10-round staggered box is available as an accessory. Both are transparent-backed, immediately showing remaining capacity. Even though spool magazines are unusual in military rifles, Steyr-Mannlicher produced Mannlicher–Schönauer rifles with one from early 1900s until 1972. The Austrian military combined the SSG 69 PI with the Kahles ZF 69 6×42 telescopic sight as an optical sight for their snipers. Later
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#17328522623444278-580: The third locking lug and feature a "cock on closing" operation. The Lee–Enfield bolt-action system was introduced in 1889 with the Lee–Metford and later Lee–Enfield rifles (the bolt system is named after the designer James Paris Lee and the barrel rifling after the Royal Small Arms Factory in the London Borough of Enfield ), and is a "cock on closing" action in which the forward thrust of
4347-538: The third safety locking lug, to simplify production. The controlled-feed on the Mauser M 98 bolt-action system is simple, strong, safe, and well-thought-out design that has inspired other military and sporting rifle designs that became available during the 20th century, including the: Versions of the Mauser action designed prior to the Gewehr 98's introduction, such as that of the Swedish Mauser rifles and carbines, lack
4416-501: The use of synthetics like the stock, trigger guard, and magazines and cold hammer-forged barrels for durability. Aside from being the Austrian Army's standard issue sniper rifle, it is also used by several law enforcement organizations. For its era and weight, it is extremely accurate and several international competitions have been won using an SSG-69 with accuracy being sub 0.15 mrad (0.5 moa ). In 2015 Steyr ended production of
4485-406: The years leading up to World War II, the Lee–Enfield bolt system was used in numerous commercial sporting and hunting rifles manufactured by such firms in the United Kingdom as BSA, LSA, and Parker–Hale, as well as by SAF Lithgow in Australia. Vast numbers of ex-military SMLE Mk III rifles were sporterised post WWII to create cheap, effective hunting rifles, and the Lee–Enfield bolt system is used in
4554-540: Was known as the UIT back then, today the International Shooting Sport Federation (ISSF) – that featured a free floating heavy barrel, walnut wood half stock and a Walther target diopter and globe sight line. Bolt-action Bolt-action is a type of manual firearm action that is operated by directly manipulating the bolt via a bolt handle , most commonly placed on the right-hand side of
4623-462: Was the first to introduce ammunition loaded with nitrocellulose-based smokeless powder ), and the Berthier series of rifles. Straight-pull bolt-actions differ from conventional turn-pull bolt-action mechanisms in that the bolt can be cycled back and forward without rotating the handle and thus only a linear motion is required, as opposed to a traditional bolt-action, where the user has to axially rotate
4692-574: Was ultimately considered too complicated for issue to soldiers and was supplanted by the Springfield Model 1861 , a conventional muzzle loading rifle. During the American Civil War, the bolt-action Palmer carbine was patented in 1863, and by 1865, 1000 were purchased for use as cavalry weapons. The French Army adopted its first bolt-action rifle, the Chassepot rifle , in 1866 and followed with
4761-628: Was used by Norway, Denmark, and briefly the United States. It is unusual among bolt-action rifles in that is loaded through a gate on the right side of the receiver, and thus can be reloaded without opening the bolt. The Norwegian and Danish versions of the Krag have two locking lugs, while the American version has only one. In all versions, the bolt handle itself serves as an emergency locking lug. The Krag's major disadvantage compared to other bolt-action designs
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