1.
SIG SG 550
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The SG550 is an assault rifle manufactured by Swiss Arms AG of Neuhausen, Switzerland. SG is an abbreviation for Sturmgewehr, or assault rifle, the rifle is based on the earlier 5. 56mm SG540 and is also known as the Fass 90 in French/Italian or Stgw 90 in German. In 1978, the Swiss Army formulated requirements for a successor to the Stgw 57 battle rifle using the 7. 5×55mm Schmidt–Rubin cartridge, another aim was to reduce the overall weight of the rifle while retaining comparable or improved accuracy out to 300 m. The solicitation was narrowed down to two designs, the W+F C42 and the SG541. In 1981, the experimental 6. 45mm GP80 cartridge was rejected in favor of the more conventional 5. 6×45mm GP90 round that is the Swiss equivalent to NATOs standard 5. 56×45mm cartridge. In February 1983, the decision to adopt the SG541 was publicly announced, production began in 1986 and four years later the rifle was officially accepted into service in 1990, hence the military designation Stgw 90. Over 600,000 rifles have been delivered since then and production for the military has now ceased, the SG550 is a selective-fire 5. 56×45mm NATO assault rifle firing from a closed bolt. Once inside the gas cylinder, propellant gases pass through an L-shaped channel machined in the head and are directed forward towards the gas valve. The pressure build-up in front of the piston pushes the piston. As the piston is driven back, the gas port and the L-shaped channel move out of alignment, surplus gas and powder residues are evacuated through an exhaust port in the gas cylinder. This system ensures that only the volume of gas required to overcome the mass. The manually adjustable gas valve has two settings, one for normal operation, and the setting for use in the presence of heavy fouling or icing. The rotary bolt locking mechanism consists of two locking lugs that engage locking recesses in the breech, and is identical to that used in the SG540. A spring-loaded extractor is incorporated into the bolt while a fixed protrusion on one of the receivers internal guide rails ejects the spent cartridge casings. The rifle is hammer-fired and has a mechanism with an ambidextrous safety and fire selector switch that has 4 settings, S—safe, 1—single fire, 3—3-round burst. The 3-round burst mode 3 and the fully automatic 20 position can be disabled by a safety guard to avert accidentally activating the continuous fire mode. The trigger is enclosed in a trigger guard which can be folded down to the left or right side allowing for unhindered operation with winter gloves. The trigger pull is approximately 35 N The firearm is fed by lightweight 20-round box magazines, 30-, 10-, the magazines are molded from a translucent polymer and can be locked together using studs in order to facilitate quicker reloading, Jungle style
2.
Weapon
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A weapon, arm, or armament is any device used with intent to inflict damage or harm to living beings, structures, or systems. Weapons are used to increase the efficacy and efficiency of such as hunting, crime, law enforcement, self-defense. In a broader context, weapons may be construed to include anything used to gain a strategic, something that has been re-purposed, converted, or enhanced to become a weapon of war is termed weaponized, such as a weaponized virus or weaponized lasers. The use of objects as weapons has been observed among chimpanzees, however, this can not be confirmed using physical evidence because wooden clubs, spears, and unshaped stones would not have left an unambiguous record. The earliest unambiguous weapons to be found are the Schöninger Speere, the first defensive structures and fortifications appeared in the Bronze Age, indicating an increased need for security. Weapons designed to breach fortifications followed soon after, for example the battering ram was in use by 2500 BC, although early Iron Age swords were not superior to their bronze predecessors, once iron-working developed, around 1300 BC in Greece Alex Webb, Metalworking in Ancient Greece. Domestication of the horse and widespread use of spoked wheels by ca.2000 BC, led to the light, the mobility provided by chariots were important during this era. Spoke-wheeled chariot usage peaked around 1300 BC and then declined, ceasing to be militarily relevant by the 4th century BC. Cavalry developed once horses were bred to support the weight of a man, the horse extended the range and increased the speed of attacks. Ships built as weapons or warships such as the trireme were in use by the 7th century BC and these ships were eventually replaced by larger ships by the 4th century BC. European warfare during the Post-classical history was dominated by groups of knights supported by massed infantry. They were involved in combat and sieges which involved various siege weapons. Knights on horseback developed tactics for charging with lances providing an impact on the enemy formations, whereas infantry, in the age before structured formations, relied on cheap, sturdy weapons such as spears and billhooks in close combat and bows from a distance. As armies became more professional, their equipment was standardized and infantry transitioned to pikes, pikes are normally seven to eight feet in length, in conjunction with smaller side-arms. In Eastern and Middle Eastern warfare, similar tactics were developed independent of European influences, the introduction of gunpowder from the Far East at the end of this period revolutionized warfare. Formations of musketeers, protected by pikemen came to dominate open battles, the European Renaissance marked the beginning of the implementation of firearms in western warfare. Guns and rockets were introduced to the battlefield, firearms are qualitatively different from earlier weapons because they release energy from combustible propellants such as gunpowder, rather than from a counter-weight or spring. This energy is released very rapidly and can be replicated without much effort by the user, therefore even early firearms such as the arquebus were much more powerful than human-powered weapons. During the U. S. Civil War various technologies including the gun and ironclad warship emerged that would be recognizable and useful military weapons today
3.
Semi-automatic firearm
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A semi-automatic, or self-loading firearm, is one that performs all steps necessary to prepare it to discharge again after firing—assuming cartridges remain in the firearms feed device. Typically, this includes extracting and ejecting the spent cartridge case from the chamber, re-cocking the firing mechanism. For the other forms, the mechanism would require cycling manually prior to firing the next round. An automatic or a selective-fire firearm set to fire automatically would be able to discharge continuously as long as the trigger is held until the magazine or feed device runs out of ammunition. Obviously, this additional feature complicates the design of the sear and disconnector, the first successful design for a semi-automatic rifle is attributed to German-born gunsmith Ferdinand Ritter von Mannlicher, who unveiled the design in 1885. The Model 85 was followed by the equally innovative Mannlicher Models 91,93 and 95 semi-automatic rifles.5 mm ammunition that were fed into the M1894 by a stripper clip. The Auto-5 relied on long recoil operation, this remained the dominant form in semi-automatic shotguns for approximately 50 years. Production of the Auto-5 was ended in 1999, in 1903 and 1905, the Winchester Repeating Arms Company introduced the first semi-automatic rimfire and centerfire rifles designed especially for the civilian market. The Winchester Model 1903 and Winchester Model 1905 operated on the principle of blowback in order to function semi-automatically, johnson, the Model 1903 achieved commercial success and continued to be manufactured until 1932 when the Winchester Model 63 replaced it. Winchester introduced a medium caliber semi-automatic sporting rifle, the Model 1907 as an upgrade to the Model 1905, utilizing a system of operation. Both the Models of 1905 and 1907 saw limited military and police use, in 1906, Remington Arms introduced the Remington Auto-loading Repeating Rifle. Remington advertised this rifle, renamed the Model 8 in 1911 and this is a locked-breech, long recoil action designed by John Browning. The Model 81 superseded the Model 8 in 1936 and was offered in.300 Savage as well as the original Remington calibers, the first semi-automatic rifle adopted and widely issued by a major military power was the Fusil Automatique Modele 1917. This is a breech, gas-operated action which is very similar in its mechanical principles to the future M1 Garand in the United States. The M1917 was fielded during the stages of WWI but it did not receive a favorable reception. However its shortened and improved version, the Model 1918, gave complete satisfaction during the Moroccan Rif War from 1920 to 1926, the Lebel bolt-action rifle remained the standard French infantry rifle until replaced in 1936 by the MAS-36 despite the various semi-automatic rifles designed between 1918 and 1935. In 1937, the American M1 Garand was the first semi-automatic rifle to replace its nations bolt-action rifle as the infantry weapon. The gas-operated M1 Garand was developed by Canadian-born John Garand for the U. S. government at the Springfield Armory in Springfield, after years of research and testing, the first production model of the M1 Garand was unveiled in 1937
4.
Firearm
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A firearm is a portable gun - a barreled weapon that launches one or more projectiles, often driven by the action of an explosive force. The first primitive firearms originated in 13th-century China when the fire lance was combined with projectiles. The technology gradually spread through the rest of East Asia, South Asia, older firearms typically used black powder as a propellant, but modern firearms use smokeless powder or other propellants. Most modern firearms have rifled barrels to impart spin to the projectile for improved flight stability, modern firearms can be described by their caliber or in the case of shotguns their gauge, by the type of action employed together with the usual means of deportment. The word firearms usually is used in a sense restricted to small arms, shooters aim firearms at their targets with hand-eye co-ordination, using either iron sights or optical sights. The accurate range of pistols generally does not exceed 100 yards, while most rifles are accurate to 550 yards using iron sights, some purpose-built sniper rifles are accurate to ranges of more than 2,200 yards. The smallest of all firearms is the handgun, there are three common types of handguns, single-shot pistols, revolvers, and semi-automatic pistols. Revolvers have a number of firing chambers or charge holes in a revolving cylinder, semi-automatic pistols have a single fixed firing chamber machined into the rear of the barrel, and a magazine so they can be used to fire more than one round. Each press of the fires a cartridge, using the energy of the cartridge to activate the mechanism so that the next cartridge may be fired immediately. This is opposed to double-action revolvers which accomplish the end using a mechanical action linked to the trigger pull. Prior to the 19th century, virtually all handguns were single-shot muzzleloaders, with the invention of the revolver in 1818, handguns capable of holding multiple rounds became popular. Certain designs of auto-loading pistol appeared beginning in the 1870s and had largely supplanted revolvers in military applications by the end of World War I. By the end of the 20th century, most handguns carried regularly by military, police and civilians were semi-automatic, both designs are common among civilian gun owners, depending on the owners intention. A long gun is any firearm that is larger than a handgun and is designed to be held. Early long arms, from the Renaissance up to the century, were generally smoothbore firearms that fired one or more ball shot. Most modern long guns are either rifles or shotguns, both are the successors of the musket, diverging from their parent weapon in distinct ways. A rifle is so named for the spiral fluting machined into the surface of its barrel. Shotguns are predominantly smoothbore firearms designed to fire a number of shot, shotguns are also capable of firing single slugs, or specialty rounds such as bean bags, tear gas or breaching rounds
5.
Automatic rifle
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Automatic rifles are distinguished from semi-automatic rifles in their ability to fire more than one shot in succession once the trigger is pulled. Many automatic rifles are select-fire weapons which are capable of firing in fully automatic and semi-automatic modes, or in some cases, most are further subcategorized as battle rifles or assault rifles. The worlds first automatic rifle was the Italian Cei-Rigotti, introduced in 1900, these 6. 5mm Carcano or 7. 65×53mm gas-operated, selective-fire, carbines attracted considerable attention at the time. They used 10-, 20- and 50-round detachable box magazines, unfortunately, they had several failings, including frequent jams and erratic shooting. In the end, no Army took an interest in the design, the Fedorov Avtomat was an automatic rifle, designed by Vladimir Grigoryevich Fyodorov in 1915 and produced in the Russian Empire and later in the Russian Soviet Federative Socialist Republic. A total of 43,200 Fedorov rifles were manufactured between 1915 and 1924 in the city of Kovrov, the vast majority of them were made after 1920. The weapon saw combat in World War I, but was used more substantially in the Russian Civil War, initially Fedorov wanted to call the class of weapons to which his new gun belonged ручное ружьё-пулемет, which reflected his tactical thinking behind the development of the weapon. The Browning Automatic Rifle was one of the first practical automatic rifles, the BAR made its successful combat debut in World War I and approximately 50,000 were made before the war came to an end. The BAR arose from the concept of Walking Fire, an idea urged upon the Americans by the French who used the Chauchat light machine gun to fulfill that role, the BAR never entirely lived up to the designers hopes, being neither a rifle nor a machinegun. For its day, though, it was a brilliant design produced in time by John Browning. It was the standard squad light automatic of the U. S. infantry during World War II, the US forces abandoned the BAR in the middle 1950s, though it was retained in reserve stocks for several years, it survived in smaller countries until the late 1970s. The FG42 was a selective fire automatic rifle or battle rifle produced in Germany during World War II, the weapon was developed specifically for the use of the Fallschirmjäger airborne infantry in 1942 and was used in limited numbers until the end of the war. It served as an automatic rifle in much the same role as the Browning BAR. The Germans sought to develop a select-fire intermediate powered rifle combining the firepower of a gun with the accuracy. This was done by shortening the standard 7. 92×57mm cartridge to 7. 92×33mm and giving it a lighter 125-grain bullet, the result was the Sturmgewehr 44. The Soviets were so impressed with the Sturmgewehr 44, that after World War II and it was finalized, adopted and entered widespread service in the Soviet army in the early 1950s. Its firepower, ease of use, low costs. The AK-47 was widely supplied or sold to nations allied with the USSR, however, early experiments with select-fire versions of the M1 Garand proved disappointing
6.
World War I
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World War I, also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history and it was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved. The war drew in all the worlds great powers, assembled in two opposing alliances, the Allies versus the Central Powers of Germany and Austria-Hungary. These alliances were reorganised and expanded as more nations entered the war, Italy, Japan, the trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary, by Yugoslav nationalist Gavrilo Princip in Sarajevo on 28 June 1914. This set off a crisis when Austria-Hungary delivered an ultimatum to the Kingdom of Serbia. Within weeks, the powers were at war and the conflict soon spread around the world. On 25 July Russia began mobilisation and on 28 July, the Austro-Hungarians declared war on Serbia, Germany presented an ultimatum to Russia to demobilise, and when this was refused, declared war on Russia on 1 August. Germany then invaded neutral Belgium and Luxembourg before moving towards France, after the German march on Paris was halted, what became known as the Western Front settled into a battle of attrition, with a trench line that changed little until 1917. On the Eastern Front, the Russian army was successful against the Austro-Hungarians, in November 1914, the Ottoman Empire joined the Central Powers, opening fronts in the Caucasus, Mesopotamia and the Sinai. In 1915, Italy joined the Allies and Bulgaria joined the Central Powers, Romania joined the Allies in 1916, after a stunning German offensive along the Western Front in the spring of 1918, the Allies rallied and drove back the Germans in a series of successful offensives. By the end of the war or soon after, the German Empire, Russian Empire, Austro-Hungarian Empire, national borders were redrawn, with several independent nations restored or created, and Germanys colonies were parceled out among the victors. During the Paris Peace Conference of 1919, the Big Four imposed their terms in a series of treaties, the League of Nations was formed with the aim of preventing any repetition of such a conflict. This effort failed, and economic depression, renewed nationalism, weakened successor states, and feelings of humiliation eventually contributed to World War II. From the time of its start until the approach of World War II, at the time, it was also sometimes called the war to end war or the war to end all wars due to its then-unparalleled scale and devastation. In Canada, Macleans magazine in October 1914 wrote, Some wars name themselves, during the interwar period, the war was most often called the World War and the Great War in English-speaking countries. Will become the first world war in the sense of the word. These began in 1815, with the Holy Alliance between Prussia, Russia, and Austria, when Germany was united in 1871, Prussia became part of the new German nation. Soon after, in October 1873, German Chancellor Otto von Bismarck negotiated the League of the Three Emperors between the monarchs of Austria-Hungary, Russia and Germany
