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91-568: The initial MAS-49 semi-automatic rifle was produced in limited quantities (20,600 units), whereas the shorter and lighter variant, the MAS-49/56, was mass-produced (275,240 units) and issued to all branches of the French military. Overall, the MAS-49 and 49/56 rifles gained the reputation of being accurate, reliable and easy to maintain in adverse environments. All the MAS-49 and 49/56 rifles feature

182-408: A White-tailed deer buck by adjusting magnification until the area between the backbone and the brisket fits between the crosshairs and the top thick post of the reticle. Once that is done, the range be read from the scale printed on the magnification adjustment ring. Although FFP designs are not susceptible to magnification-induced errors, they have their own disadvantages. It's challenging to design

273-500: A mathematical formula "[Target size] ÷ [Number of mil intervals] × 1000 = Distance", the user can easily calculate the distance to a target, as a 1-meter object is going to be exactly 1 milliradian at a 1000-meter distance. For example, if the user sees an object known to be 1.8 meters tall as something 3 mils tall through the telescopic sight, the distance to that object will be 600 meters (1.8 ÷ 3 × 1000 = 600). Some milling reticles have additional marking patterns in

364-602: A scope informally, is an optical sighting device based on a refracting telescope . It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim. Telescopic sights are used with all types of systems that require magnification in addition to reliable visual aiming, as opposed to non-magnifying iron sights , reflector (reflex) sights , holographic sights or laser sights , and are most commonly found on long-barrel firearms , particularly rifles, usually via

455-491: A scope mount . Similar devices are also found on other platforms such as artillery , tanks and even aircraft . The optical components may be combined with optoelectronics to add night vision or smart device features. The first experiments directed to give shooters optical aiming aids go back to the early 17th century. For centuries, different optical aiming aids and primitive predecessors of telescopic sights were created that had practical or performance limitations. In

546-450: A zoom mechanism behind the erector lenses . Variable-power sights offer more flexibility when shooting at varying distances, target sizes and light conditions, and offer a relative wide field of view at lower magnification settings. The syntax for variable sights is the following: minimal magnification – maximum magnification × objective lens , for example "3-9×40" means a telescopic sight with variable magnification between 3× and 9×, and

637-416: A 40 mm objective lens. The ratio between the maximum and minimum magnifications of a variable-power sight is known as its "zoom ratio". Confusingly, some older telescopic sights, mainly of German or other European manufacture, have a different classification where the second part of the designation refers to light-gathering power. In these cases, a 4×81 (4× magnification) sight would be presumed to have

728-429: A brighter sight picture than a 2.5×70 (2.5× magnification), but the objective lens diameter would not bear any direct relation to picture brightness, as brightness is affected also by the magnification factor. Typically objective lenses on early sights are smaller than modern sights, in these examples the 4×81 would have an objective 36 mm diameter and the 2.5×70 should be approximately 21 mm (relative luminosity

819-445: A combination of the above, that are added to a crosshair to help with easier aiming. Many modern reticles are designed for (stadiametric) rangefinding purposes. Perhaps the most popular and well-known ranging reticle is the mil-dot reticle , which consists of a duplex crosshair with small dots marking each milliradian (or "mil") intervals from the center. An alternative variant uses perpendicular hash lines instead of dots, and

910-405: A complex production process. The main tube of telescopic sights varies in size, material, the applied production process and surface finish. The typical outside diameters vary between 19.05 mm (0.75 in) and 40 mm (1.57 in), although 25.4 mm (1 in), 30 mm and recently 34 mm are by far the most common sizes. The internal diameter of the main tube influences

1001-662: A crisp tactile feedback corresponding to each graduation of turn, often accompanied by a soft but audible clicking sound. Each indexing increment is thus colloquially called a "click", and the corresponding angular adjustment of the optical axis is known as the click value . The most commonly seen click values are 1 ⁄ 4   MOA (often expressed in approximations as " 1 ⁄ 4  inch at 100 yards") and 0.1  mil (often expressed as "10 mm at 100 meters"), although other click values such as 1 ⁄ 2  MOA, 1 ⁄ 3  MOA or 1 ⁄ 8  MOA and other mil increments are also present on

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1092-445: A first focal plane reticle expands and shrinks along with the rest of the image as the magnification is adjusted, while a second focal plane reticle would appear the same size and shape to the user as the target image grows and shrinks. In general, the majority of modern variable-power sights are SFP unless stated otherwise. Every European high-end telescopic sight manufacturer offers FFP reticles on variable power telescopic sights, since

1183-470: A fixed magnification factor of 10×, with a 50 mm objective lens. In general terms, larger objective lens diameters, due to their ability to gather a higher luminous flux , provide a larger exit pupil and hence provide a brighter image at the eyepiece . Most early telescopic sights were fixed-power and were in essence specially designed viewing telescopes. Telescopic sights with variable magnifications appeared later, and were varied by manually adjusting

1274-538: A gas cutoff that prevents gas from entering the gas tube from the gas port when firing grenade launching blank ammunition. Attempts were made to replace the MAS-49, in the form of the MAS-54 and the FA-MAS Type 62 , both 7.62×51mm NATO battle rifles , but neither were successful. The MAS-49/56 ended production in 1978 and was replaced with the 5.56×45mm NATO caliber FAMAS bullpup assault rifle . The MAS-49/56

1365-402: A hollow located on the front face of the bolt carrier. The contained forces of the gases move the carrier to the rear against the operating spring pressure with enough momentum to open the bolt, and within a short distance the end of the tube is exposed vent to the atmosphere. The M16 system vents gas from the barrel through a tube and into the body of the bolt carrier where it expands. Rings on

1456-749: A light source to provide an illuminated reticle for low-light condition aiming. In sights such as the SUSAT or Elcan C79 Optical Sight tritium-illuminated reticles are used. The Trijicon Corporation, famous for their ACOG prism sights that are adopted by various assault infantry branches of the United States military , uses tritium in their combat and hunting-grade firearm optics. The tritium light source has to be replaced every 8–12 years, since it gradually loses brightness due to radioactive decay . National Police (France) The National Police ( French : Police nationale ), formerly known as

1547-584: A long-eye relief (LER) telescopic sight is the German ZF41 which was used during World War II on Karabiner 98k rifles. An early example of a man-portable sight for low visibility/night use is the Zielgerät (aiming device) 1229 (ZG 1229), also known by its code name Vampir ("vampire"). The ZG 1229 Vampir was a Generation 0 active infrared night vision device developed for the Wehrmacht for

1638-512: A rail on the left side of their receivers to accommodate a designated rifle scope . The MAS-49 and MAS-49/56 were replaced as French service rifles by the FAMAS assault rifle in 1979. The MAS-49 arrived after a series of small, distinct design improvements. Today, this might be termed spiral development , where small elements are changed with successive models, rather than large significant changes. The MAS-49 semi-automatic rifle evolved from

1729-672: A rear-locking tilting bolt, as on the M1895 Colt–Browning machine gun , the Browning Automatic Rifle (1918), the MAS-1924 to MAS-1928 experimental semi-auto rifles, and the Russian Simonov SVT-38 (1938) and SVT-40 (1940) rifles. The MAS direct impingement design reduced the number of bolt moving parts to only six: the bolt carrier, then the rear locking tilting bolt which carries the extractor,

1820-541: A reputation for reliability in conditions of poor maintenance, sometimes being cleaned with nothing more than rags and motor oil. The 49 and 49/56 series could also endure harsh service environments, seeing combat in Algeria, Djibouti , Indochina, French Guiana , and the Battle of Kolwezi . An improved version called the MAS-49/56 was introduced in 1957 and incorporated lessons learned from service in Algeria, Indochina, and

1911-474: A reticle that is visible through the entire range of magnification: a reticle that looks fine and crisp at 24× magnification may be very difficult to see at 6×. On the other hand, a reticle that is easy to see at 6× may be too thick at 24× to make precision shots. Shooting in low light conditions also tends to require either illumination or a bold reticle, along with lower magnification to maximize light gathering. In practice, these issues tend to significantly reduce

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2002-703: A round dot, small cross , diamond , chevron and/or circle in the center (in some prism sights and reflex / holographic sights ), or a pointed vertical bar in a " T "-like pattern (such as the famous "German #1" reticle used on the Wehrmacht ZF41 sights during the Second World War , or the SVD -pattern reticle used on the Soviet PSO-1 sights during the Cold War ) that essentially imitates

2093-595: A sight made by gunsmith Morgan James of Utica, New York . Chapman worked with James on the concepts and design of the Chapman-James sight. In 1855, optician William Malcolm of Syracuse, New York began producing his own telescopic sight, used an original design incorporating achromatic lenses such as those used in telescopes, and improved the windage and elevation adjustments. These Malcolm sights were between 3× and 20× magnification (possibly more). Malcolm's sights and those made by Vermont jeweller L. M. Amidon were

2184-447: A stripper clip guide built into the bolt face. Lastly, the MAS-49 and MAS-49/56 are equipped with a rail on the left side of the receiver. It allows for the immediate installation of a "Modele 1953" APX L 806 (SOM) 3.85 power telescopic sight by sliding it into place and then locking it in with a small pressure lever. The MAS-49 and MAS-49/56 are capable of consistently hitting individual man-size targets up to 400 m (1,300 ft) with

2275-781: A target of a known diameter of 16 inches fills just half of the total post-to-post distance (i.e. filling from sight center to post), then the distance to target is approximately 200 yards (180 m). With a target of a diameter of 16 inches that fills the entire sight picture from post to post, the range is approximately 100 yards. Other ranges can be similarly estimated accurately in an analog fashion for known target sizes through proportionality calculations. Holdover, for estimating vertical point of aim offset required for bullet drop compensation on level terrain, and horizontal windage offset, for estimating side to side point of aim offsets required for wind effect corrections, can similarly be compensated for through using approximations based on

2366-518: A telescope to a rifle as a sighting aid, but was unable to mount it sufficiently far forward to prevent the eyepiece impacting with the operator's eye during recoil . In the same year, James Lind and Captain Alexander Blair described a gun which included a telescopic sight. The first rifle sight was created in 1835 -1840. In the book The Improved American Rifle , written in 1844, British-American civil engineer John R. Chapman described

2457-417: A typical Leupold brand 16 minute of angle (MOA) duplex reticle (similar to image B) on a fixed-power telescopic sight, the distance from post to post, between the heavier lines of the reticle spanning the center of the sight picture, is approximately 32 inches (810 millimeters) at 200 yards (180 m), or, equivalently, approximately 16 inches (410 millimeters) from the center to any post at 200 yards. If

2548-409: Is essential that its brightness can be adjusted. A reticle that is too bright will cause glare in the operator's eye, interfering with their ability to see in low-light conditions. This is because the pupil of the human eye closes quickly upon receiving any source of light. Most illuminated reticles provide adjustable brightness settings to adjust the reticle precisely to the ambient light. Illumination

2639-406: Is etched onto one of the prism's internal reflection surfaces, which allows an easy way to illuminate the reticle (from the back side of the prism) even when active illumination is turned off. Being optical telescopes , prism sights can focally compensate for a user's astigmatism . Prismatic sights are lighter and more compact than conventional telescopic sights, but are mostly fixed-powered in

2730-465: Is known as the mil-hash reticle . Such graduated reticles, along with those with MOA -based increments, are collectively and unofficially called " milling reticles ", and have gained significant acceptance in NATO and other military and law enforcement organizations. Mil-based reticles, being decimal in graduations, are by far more prevalent due to the ease and reliability of ranging calculations with

2821-675: Is that admirable secret, which, as all other things, appeared when it pleased the All Disposer, at whose direction a spider's line drawn in an opened case could first give me by its perfect apparition, when I was with two convexes trying experiments about the sun, the unexpected knowledge...if I .... placed a thread where that glass [the eyepiece] would best discern it, and then joining both glasses, and fitting their distance for any object, I should see this at any part that I did direct it to ..." — William Gascoigne In 1776, Charles Willson Peale collaborated with David Rittenhouse to mount

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2912-722: Is the MAS-38/39. It was successfully tested in March 1939, just before World War II, and followed in May 1940 by the nearly identical MAS 1940. Similar direct impingement designs include the Swedish semi-automatic Ag m/42 adopted in 1942, and the US M16 select-fire rifle adopted in 1963. In the AG42B and MAS systems, gas is vented from a port on top of the barrel through a small diameter tube to

3003-470: Is the square of the exit pupil as measured in mm; a 36 mm objective lens diameter divided by the 4× magnification gives an exit pupil of 9 mm; 9×9=81) A relatively new type of telescopic sight, called prismatic telescopic sight , prismatic sight or " prism scope ", replaces the image-erecting relay lenses of a traditional telescope with a roof prism design commonly found in compact binoculars , monoculars and spotting scopes . The reticle

3094-463: Is usually provided by a battery -powered LED , though other electric light sources can be used. The light is projected forward through the sight, and reflects off the back surface of the reticle. Red is the most common colour used, as it least impedes the shooter's natural night vision . This illumination method can be used to provide both daytime and low-light conditions reticle illumination. Radioactive isotopes such as tritium can also be used as

3185-593: The Sûreté nationale , is one of two national police forces of France , the other being the National Gendarmerie . The National Police is the country's main civil law enforcement agency , with primary jurisdiction in cities and large towns. By contrast, the National Gendarmerie has primary jurisdiction in smaller towns, as well as in rural and border areas. The National Police comes under

3276-594: The Cartesian coordinate system , which the shooter can use as a simple reference for rough horizontal and vertical calibrations. Crosshair reticles typically do not have any graduated markings, and thus are unsuitable for stadiametric rangefinding . However some crosshair designs have thickened outer sections that help with aiming in poor contrast situations when the fine crosshair center cannot be seen clearly. These "thin-thick" crosshair reticles, known as duplex reticles , can also be used for some rough estimations if

3367-662: The MAS-49 replaced the diverse collection of aging bolt-action rifles ( MAS-36 , Lee–Enfield No4 , M1903A3 Springfield , U.S. M1917 , Berthier , and K98k ) which had been absorbed into French service after the end of World War II . It saw significant service with French troops in the latter stages of the First Indochina War , as well as during the Algerian War and the Suez Crisis . The MAS-49 series had

3458-594: The Ministry of the Interior . The National Police is divided into three corps , in the terminology of the French Civil Service , in ascending order of seniority: All the ranks insignia may be worn either on the shoulders or on the chest. In the latter they are square-shaped. Prior to 1995 two civilian corps (" Inspecteurs " and " Enquêteurs ") existed in which plainclothes officers were given

3549-754: The Second World War , a variety of military side arms were issued, often captured weapons provided by the Army or French-produced German-designed weapons, such as the Mauser HSc or the Walther P38 for sidearms, and the Karabiner 98k rifle, to the now unified national force. In 1951, a standardisation was performed on the RR 51 pistol in 7.65×17mm and on the MAS-38 and MAT-49 for submachine guns. From 1953, in

3640-495: The StG 44 assault rifle, intended primarily for night use. The issuing of the ZG 1229 Vampir system to the military started in 1944 and it was used on a small scale in combat from February 1945 until the final stages of World War II. Telescopic sights are classified in terms of the optical magnification (i.e. "power") and the objective lens diameter . For example, "10×50" would denote

3731-519: The eyepiece , since the image illuminance is often sufficient without needing an enlarged objective bell to enhance light-gathering. Most LPVOs have reticles mounted at the second focal plane, but recently first-focal plane LPVOs have become popular, especially those with high zoom ratios above 6×. LPVOs are also informally referred to as " AR scopes" or " carbine scopes", due to the recently increasing popularity of modern sporting rifles and compact "tactical"-style semi-automatic rifles used among

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3822-501: The law enforcement , home defense and practical shooting enthusiasts crowd. Telescopic sights are usually designed for the specific application for which they are intended. Those different designs create certain optical parameters. Those parameters are: Because a typical telescopic sight has several optical elements with special characteristics and several air-to-glass surfaces, telescopic sight manufacturers use different types of optical coatings for technical reasons and to improve

3913-674: The 2000s, the police started switching to semi-automatic pistols and to the 9×19mm Parabellum cartridge. For some years, the standard sidearm in the National Police and the Gendarmerie Nationale was the PAMAS G1 , which was French licensed and made. In 2003 both agencies made the biggest small arms contract since the Second World War for about 250,000 SIG Sauer Pro SP 2022s , a custom-tailored variant of

4004-697: The General Directorate of the National Police ( French : Direction Générale de la Police nationale ) (DGPN) and responsible to the Minister of the Interior. The Préfet de Police , currently Laurent Nuñez , manages the Préfecture de Police de Paris that includes all police and security services in Paris , the three neighbouring departments of the 'la petite couronne' region ( Hauts-de-Seine , Seine-Saint-Denis and Val-de-Marne ), and

4095-677: The Police nationale: the forces of the Sûreté nationale (with the former services of the Sûreté générale, which became the Sûreté nationale in 1934, and the municipal police units, which became "étatisées" for the police forces of towns with more than 10,000 inhabitants) and the police services of the Préfecture de police in Paris are thus united. It was dissolved after the Liberation , by order of

4186-668: The Provisional Government of the French Republic on 16 November 1944. It was revived by Law no. 66-492 of 9 July 1966, on the organization of the police in France. This law unified the Sûreté Nationale and the Préfecture de Police. The National Police operates mostly in cities and large towns. In that context, it conducts security operations such as patrols , traffic control and identity checks. Under

4277-587: The SIG Pro, replacing the PAMAS-G1 and several other pistols in service. The weapons are planned to stay in service until the year 2022, hence the weapon name. The police purchased more pistols in late 2018 possibly indicating they intend them to be used beyond 2022. For greater threats the police use slightly modified Ruger Mini-14s purchased in the 1970s. More modern long guns like Remington 870 , HK UMP and HK G36 are also issued. Some sources have claimed

4368-475: The Suez Crisis. The rifle was shortened and lightened to improve mobility for mechanized and airborne troops, and a knife bayonet was added. The MAS-49 built-in rifle grenade launcher was replaced by a combination compensator / rifle grenade launcher that fired NATO -standard 22mm rifle grenades . The rifle also incorporates an integral grenade launching sight that is attached to the front sight block and

4459-461: The adjustable peep sight and up to 800 m (2,600 ft) with the APX L 806 telescopic sight. The bore is counter sunk at the muzzle to protect the rifling and preserve accuracy. The barrel is freely floating. Syria contracted with MAS for 6,000 MAS-49 rifles. These rifles, along with 12,000 MAS-36 rifles and a production facility for 7.5×54mm ammunition were delivered in the early 1950s. The MAS-49

4550-437: The aim high and away from the target, are therefore called holdover reticles . Such aiming technique can quickly correct for ballistic deviations without needing to manually readjust the sight's zero, thus enabling the shooter to place rapid, reliably calibrated follow-up shots. When shooting at extended distances , the farther the target, the greater the bullet drops and wind drifts that need to be compensated. Because of this,

4641-682: The airports of Roissy , Orly and Le Bourget . The Paris Police Prefecture is a separate law enforcement jurisdiction. While its officers belong to the National Police, their chief (the Police Prefect) acts completely independently from the Director-General of the National Police, reporting directly to the French Minister of the Interior. The elevated status of the Paris Police Prefect is also underlined by

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4732-412: The amount of "lost" light present inside the telescopic sight which would otherwise make the image appear hazy (low contrast). A telescopic sight with good optical coatings may yield a brighter image than uncoated telescopic sights with a larger objective lens, on account of superior light transmission through the assembly. The first transparent interference-based coating Transparentbelag (T) used by Zeiss

4823-451: The amount of space within which the relay lens group and other optical elements can be mounted, the maximum size of the erector tube, and the maximum angular ranges for elevation and windage adjustments. Telescopic sights intended for long-range and/or low-light usage generally feature larger main tube diameters. Besides optical, spatial and attainable range of elevation and windage adjustments considerations, larger diameter main tubes offer

4914-532: The available magnification range on FFP sights compared to SFP, and FFP sights are much more expensive compared to SFP models of similar quality. Most high-end optics manufacturers leave the choice between a FFP or SFP mounted reticle to the customer or have sight product models with both setups. Variable-power telescopic sights with FFP reticles have no problems with point of impact shifts. Variable-power telescopic sights with SFP reticles can have slight point-of-impact shifts through their magnification range, caused by

5005-476: The bolt body form a seal and the expanding gases move the bolt carrier to the rear, which starts the bolt opening cycle. The spent gases then vent through now exposed holes in the side of the bolt carrier. The MAS system has the advantage of not depositing gas fouling on the bolt itself, a separate part located underneath the bolt carrier. All the French MAS 7.5mm semi-automatic rifles mentioned herein feature

5096-437: The bottom two quadrants , consisting of elaborate arrays of neatly spaced fine dots, "+" marks or hashed lines (usually at 0.2  mil or ½  MOA intervals), to provide accurate references for compensating bullet drops and wind drifts by simply aiming above (i.e. "hold [the aim] over" the target) and upwind of the target (i.e. deflection shooting , or " Kentucky windage "). This type of reticles, designed to hold

5187-475: The coating, the character of the image seen in the telescopic sight under normal daylight can either "warmer" or "colder" and appear either with higher or lower contrast. Subject to the application, the coating is also optimized for maximum color fidelity through the visible spectrum . A common application technique is physical vapor deposition of one or more superimposed very thin anti-reflective coating layer(s) which includes evaporative deposition , making it

5278-414: The commercial and military and law enforcement sights. Older telescopic sights often did not offer internal windage and/or elevation adjustments in the telescopic sight. In case the telescopic sight lacked internal adjustment mechanisms adjustable mounts are used (on the scope rings or the mounting rail itself) for sighting-in . Telescopic sights come with a variety of different reticles , ranging from

5369-706: The context of heightening violence of the Algeria War , CRS units were upgraded to the 9×19mm MAC Mle 1950 . In the early 1960s, large-caliber revolvers were introduced, culminating with the introduction of the Manurhin MR 73 and the Ruger SP101 . In the 80s, a process to standardize revolvers was initiated. The 1970s also saw the introduction of automatic rifles and carbines (such as the SIG SG 543 ) to fend off heavily armed organised crime and terrorism. In

5460-453: The control of the Director-General for the rest. The National Police is sub-divided into (central) directorates, which are further composed of sub-directorates: As of 1 July 2008, the following two National Police directorates: were merged into one single domestic intelligence agency titled the Direction centrale du renseignement intérieur (DCRI). The DCRI was placed directly under

5551-454: The ejector and the firing pin, and lastly the recoil spring. It takes only a few seconds to disassemble the entire bolt mechanism for cleaning. The same 10-round detachable magazine fits the MAS-44, MAS-49 and MAS-49/56 rifles. The earlier MAS-40 (1940) rifle had a 5-round magazine within the receiver, as on the bolt action MAS-36 rifle . The rifle can still be fed by stripper clips , and have

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5642-463: The fact that he/she is also head of the Île-de-France Defence and Security Zone ( Zone de défense et de sécurité Île-de-France ). The police forces in the other departments of the Île-de-France region are under the direct command of a Préfet (Department Prefect), being himself under the supervision of the Préfet de Police as far as the active on-the-field police work is concerned, and under

5733-446: The front post on iron sights . However, most reticles have both horizontal and vertical lines to provide better visual references. The crosshair is the most rudimentary reticle, represented as a pair of smooth, perpendicularly intersecting lines in the shape of a " + ", and the crosshair center is used for aiming the weapon. The crosshair lines geometrically resemble the X- and Y-axis of

5824-418: The gas shutoff pin with a tapped set screw for gas adjustment. Commercial 7.5×54mm "French" ammunition made in countries other than France for current distribution has been known to produce burst fire (2 or 3 rounds at a time) because of more sensitive primers. The original heavy steel firing pins on the MAS-49 and 49/56 can be replaced by commercial titanium firing pins which are much lighter and generally cure

5915-418: The highest power. Some long-range shooters and military snipers use fixed-power telescopic sights to eliminate this potential for error. Some SFP sights take advantage of this aspect by having the shooter adjust magnification until the target fits a certain way inside the reticle and then extrapolate the range based on the power adjustment. Some Leupold hunting sights with duplex reticles allow range estimation to

6006-604: The human eye luminous efficiency function variance. Maximal light transmission around wavelengths of 555 nm ( green ) is important for obtaining optimal photopic vision using the eye cone cells for observation in well-lit conditions. Maximal light transmission around wavelengths of 498 nm ( cyan ) is important for obtaining optimal scotopic vision using the eye rod cells for observation in low light conditions. These allow high-quality 21st century telescopic sights to practically achieve measured over 90% light transmission values in low light conditions. Depending on

6097-402: The image they produce. Lens coatings can increase light transmission, minimize reflections, repel water and grease and even protect the lens from scratches. Manufacturers often have their own designations for their lens coatings. Anti-reflective coatings reduce light lost at every optical surface through reflection at each surface. Reducing reflection via anti-reflective coatings also reduces

6188-474: The jurisdiction of the Ministry of the Interior and has about 145,200 employees (as of 2015). Young French citizens can fulfill their mandatory service ( Service national universel ) in the police force. The national police force was created on 14 August 1941, under the Vichy regime , by a decree signed by the head of government, Philippe Pétain . This decree implements the law of 23 April 1941, creating

6279-434: The late 1630s, English amateur astronomer William Gascoigne was experimenting with a Keplerian telescope and left it with the case open. Later he found that a spider had spun its web inside the case, and when he looked through the telescope he found that the web was in focus with distant objects. Gascoigne realised that he could use this principle to make a telescopic sight for use in his astronomical observations. "This

6370-432: The low magnification range (1–4×, 1–6×, 1–8×, or even 1–10×) are known as low-power variable optics or LPVOs . These telescopic sights are often equipped with built-in reticle illumination and can be dialed down to 1× magnification. As low magnifications are mostly used in close- and medium ranges, LPVOs typically have no parallax compensation (though a few rare models do) and have a completely cylindrical shape ahead of

6461-614: The low magnification ranges (usually 2×, 2.5×, 3× or more commonly 4×, occasionally 1× or 5× or more), suitable for shooting at short/medium distances. One of the best known examples is the battle-proven Trijicon ACOG used by the USMC , US Army, and USSOCOM , although variable-magnification prism sights do also exist, such as the ELCAN Specter DR/TR series used by the Canadian Army . Variable-zoom telescopic sights in

6552-547: The oldest type of reticles and are made out of metal wire or thread, mounted in an optically appropriate position in the telescopic sight's tube. Etched reticles are an optic element, often a glass plate, with inked patterns etched onto it, and are mounted as an integrated part of the lightpath . When backlit through the ocular, a wire reticle will reflect incoming light and cannot present a fully opaque (black) reticle with high contrast. An etched reticle will stay fully opaque (black) if backlit. Reticle patterns can be as simple as

6643-468: The optical needs of European hunters who live in jurisdictions that allow hunting at dusk, night and dawn differ from hunters who traditionally or by legislation do not hunt in low light conditions. The main disadvantage of SFP designs comes with the use of range-finding reticles such as mil-dot. Since the proportion between the reticle and the target is dependent on selected magnification, such reticles only work properly at one magnification level, typically

6734-401: The orders and supervision of investigating magistrates of the judiciary, it conducts criminal inquiries and serves search warrants. It also maintains specific services ('judicial police') for these inquiries. The National Police is commanded by the Director-General ( directeur général de la police nationale ), who is currently Frédéric Veaux. The Director-General is personally in command of

6825-511: The original 7.5x54 caliber. The direct impingement gas system was first applied in 1901 to a 6 mm (0.24 in) semi-automatic experimental rifle (the ENT B-5 ) designed by Rossignol for the French military. Although several experimental prototypes using a tilting bolt and direct impingement had been tested by MAS since 1924, the immediate precursor to the MAS 7.5mm semi-automatic rifle series

6916-912: The positioning of the reticle in the mechanical zoom mechanism in the rear part of the telescopic sight. Normally these impact shifts are insignificant, but accuracy-oriented users, who wish to use their telescopic sight trouble-free at several magnification levels, often opt for FFP reticles. Around the year 2005 Zeiss was the first high-end European telescopic sight manufacturer who brought out variable magnification military grade telescopic sight models with rear SFP mounted reticles. They get around impermissible impact shifts by laboriously hand-adjusting every military grade telescopic sight. The American high-end telescopic sight manufacturer U.S. Optics Inc. also offers variable magnification military grade telescopic sight models with SFP mounted reticles. Either type of reticle can be illuminated for use in low-light or daytime conditions. With any illuminated low-light reticle, it

7007-709: The possibility to increase the tube walls thickness (hence a more robust sight) without sacrificing a lot of internal diameter. A telescopic sight can have several manual adjustment controls in the form of control knobs or coaxial rings. All telescopic sights have the first three (diopter, elevation, windage) adjustment controls, and the fourth (magnification) control is offered on variable-power sights. The remaining two adjustments are optional and typically only found on higher-end models with additional features. The windage and elevation adjustment knobs (colloquially called "tracking turrets") often have internal ball detents to help accurately index their rotation, which provide

7098-420: The problem of burst fire on these weapons. It is also possible to prevent these slamfires by shortening the firing pin by approximately 0.5 mm (0.020 in), or by modifying the bolt to accommodate a firing pin return spring.Some users have been able to convert 20 round FN FAL magazines to work in the 7.62mm NATO guns and 25 round FM 24/29 light machine gun or 35 round Reibel machine gun magazines for

7189-740: The prototype MAS-38/39 and from the MAS-40 , and lastly from the post-war MAS-44 and its minor variants 44A, 44B and 44C. Although 50,000 MAS-44 rifles were ordered in January 1945, only 6,200 were delivered to the French Navy . The MAS-49 was formally adopted by the French Army in July 1949. Its final form the MAS 49-56 was the French service rifle until adoption of the FAMAS . As a service rifle ,

7280-528: The reference arrays of holdover reticles are typically much wider at the lower portion, shaping into an isosceles triangle / trapezium that resembles the canopy of a spruce , the ornamental tree traditionally used to make Christmas trees . Holdover reticles therefore are colloquially also known as " Christmas tree reticles ". Well-known examples of these reticles include GAP G2DMR, Horus TReMoR series and H58/H59, Vortex EBR-2B and Kahles AMR. Telescopic sights based on image erector lenses (used to present to

7371-546: The shortening of the barrel to allow rechambering brings the gas vent closer to the chamber hence creating a higher stress on the bolt carrier. In addition to these Century Arms conversions, approximately 250 MAS-49/56 rifles were converted in France to 7.62×51mm NATO for use by the French National Police . These rifles are not known to have the reliability issues that plague the later Century Arms conversions. Some have been able to improve reliability by modifying

7462-409: The simple crosshairs to complex reticles designed to allow the shooter to range a target, to compensate for the bullet drop, and to adjust windage required due to crosswinds. A user can estimate the range to objects of known size, the size of objects at known distances, and even roughly compensate for both bullet drop and wind drifts at known ranges with a reticle-equipped sight. For example, with

7553-657: The standard sharpshooter equipment during the American Civil War . Other telescopic sights of the same period were the Davidson and the Parker Hale . An early practical refracting telescope based telescopic sight was built in 1880 by August Fiedler (of Stronsdorf , Austria ), forestry commissioner of German Prince Reuss . Later telescopic sights with extra long eye relief became available for use on handguns and scout rifles . A historic example of

7644-548: The training and authority to conduct investigations. The closest American equivalent is the detective branch. Prior to the Second World War and the formation of the Police Nationale, the French police used a variety of side arms, both revolvers and semi-automatic pistols, notably comprising the MAS 1873 , the MAS 1892 , the FN M1900 , Ruby pistols , and a variety of privately purchased weapons. Immediately after

7735-462: The transition point between thinner and thicker lines are at a defined distance from the center, as seen in designs such as the common 30/30 reticles (both the fine horizontal and vertical crosshair lines are 30  MOAs in length at 4× magnification before transition to thicker lines). There can be additional features such as enlarged center dot (frequently also illuminated ), concentric circle (solid or broken/dashed), chevron , stadia bars, or

7826-812: The ubiquitous metric units , as each milliradian at each meter of distance simply corresponds to a subtension of 1 millimeter; while MOA-based reticles are more popular in civilian usage favoring imperial units (e.g. in the United States), because by coincidence 1 MOA at 100 yards (the most common sight-in distance) can be confidently rounded to 1 inch. To allow methodological uniformity, accurate mental calculation and efficient communication between spotters and shooters in sniper teams , mil-based sights are typically matched by elevation/windage adjustments in 0.1 mil increments. There are however military and shooting sport sights that use coarser or finer reticle increments. By means of

7917-551: The user with an upright image) have two planes of focus where a reticle can be placed: at the focal plane between the objective and the image erector lens system (the First Focal Plane (FFP)), or the focal plane between the image erector lens system and the eyepiece (the Second Focal Plane (SFP)). On fixed power telescopic sights there is no significant difference, but on variable power telescopic sights

8008-447: The wind speed, from observing flags or other objects, by a trained user through using the reticle marks. The less-commonly used holdunder, used for shooting on sloping terrain, can even be estimated by an appropriately-skilled user with a reticle-equipped sight, once both the slope of the terrain and the slant range to target are known. There are two main types of reticle constructions: wire reticle and etched reticle . Wire reticles are

8099-478: Was invented in 1935 by Olexander Smakula . A classic lens-coating material is magnesium fluoride , which reduces reflected light from 5% to 1%. Modern lens coatings consist of complex multi-layers and reflect only 0.25% or less to yield an image with maximum brightness and natural colors. Determined by the optical properties of the lenses used and intended primary use of the telescopic sight, different coatings are preferred, to optimize light transmission dictated by

8190-538: Was used until the mid-late 1960s when they were replaced with AK-47 assault rifles. Syrian contract rifles differed from the French service model by having a spike bayonet identical to that of the MAS-36, as well as different stocks and metal parts to incorporate this change. These rifles are dated 1953 and features serial numbers in the F33.000 to F39.000 range. Rifle scope A telescopic sight , commonly called

8281-595: Was withdrawn from service in 1990. Whereas only 20,600 MAS-49 were manufactured, the MAS-49/56 was mass-produced, attaining a total of 275,240 rifles issued between 1957 and 1978. Many MAS-49/56 rifles imported as surplus into the United States were rechambered locally by Century Arms International to fire the 7.62mm NATO round. However several user reports have noted that these particular conversions were often unsatisfactory (resulting in numerous action stoppages and misfires) due to imperfect workmanship. Furthermore,

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