Third-person shooter is a subgenre of 3D shooter games in which the player character is visible on-screen during gaming, the gameplay consists of shooting. A third-person shooter is a game structured around shooting, in which the player can see the avatar on-screen in a third-person view. Third-person shooter is a game where instead of seeing the games through the main character’s eyes, you see the main character moving and shooting in the game and the game is focused on shooting, it is a 3D genre, that has grown to prominence in recent years on consoles. It combines the shooting elements of the first-person shooter with the jumping and climbing elements of puzzle-based games and brawlers. Third-person shooter games always incorporate an aim-assist feature, since aiming from a third-person camera is difficult. Most have a first-person view, which allows precise shooting and looking around at environment features that are otherwise hidden from the default camera. In most cases, the player must stand still to use first-person view, but newer titles allow the player to play like a FPS.
These games are related to first-person shooters, which tie the perspective of the player to an avatar, but the two genres are distinct. While the first-person perspective allows players to aim and shoot without their avatar blocking their view, the third-person shooter shows the protagonist from an "over the shoulder shot" or "behind the back" perspective. Thus, the third-person perspective allows the game designer to create a more characterized avatar and directs the player's attention as in watching a film. In contrast, a first-person perspective provides the player with greater immersion into the game universe; this difference in perspective affects gameplay. Third-person shooters allow players to see the area surrounding the avatar more clearly; this viewpoint facilitates more interaction between the character and their surrounding environment, such as the use of tactical cover in Gears of War, or navigating tight quarters. As such, the third-person perspective is better for interacting with objects in the game world, such as jumping on platforms, engaging in close combat, or driving a vehicle.
However, the third-person perspective can interfere with tasks. Third-person shooters sometimes compensate for their distinct perspective by designing larger, more spacious environments than first-person shooters; the boundaries between third-person and first-person shooters are not always clear. For example, many third-person shooters allow the player to use a first-person viewpoint for challenges that require precise aiming; the first-person shooter Halo: Combat Evolved was designed as a third-person shooter, but added a first-person perspective to improve the interface for aiming and shooting. The game switches to a third-person viewpoint when the avatar is piloting a vehicle, this combination of first-person for aiming and third-person for driving has since been used in other games. Metroid Prime is another first-person shooter that switches to a third-person perspective when rolling around the environment using the morph ball. Alexander R. Galloway writes that the "real-time, over-the-shoulder tracking shots of Gus Van Sant's Elephant evoke third-person shooter games like Max Payne, a close cousin of the FPS".
2D third-person shooters have existed since the earliest days of video games, dating back to Spacewar!. Arcade shooters with a 3D third-person perspective include Nintendo's Radar Scope, Atari's Tempest, Nihon Bussan's Tube Panic, Sega's Space Harrier, Atari's Xybots, Square's 3-D WorldRunner. and JJ Third-person shooters for home computers include Dan Gorlin's Airheart and Paul Norman's Beyond Forbidden Forest. Konami's run & gun shooter Contra featured several third-person shooter levels where the player trudges through indoor enemy bases. Konami's Devastators is a third-person shooter where, rather than moving forward automatically, the player walks forward by holding the Up direction, as the background scales toward the screen. Devastators featured various obstacles that could be used to take cover from enemy fire, as well as two-player cooperative gameplay. A similar shooter released that same year was Cabal, which inspired many of its own "Cabal clones," such as NAM-1975 and Wild Guns.
Kurt Kalata of Hardcore Gaming 101 cites Sega's Last Survivor, released for arcades and ported to the FM Towns and FM Towns Marty, featuring eight-player deathmatch. He notes that it has a perspective and split-screen similar to Xybots, but with different gameplay and controls. In 1993, Namco released a two-player competitive 3D third-person shooter vehicle combat game, Cyber Sled. A year Elite Systems Ltd. released Virtuoso on the 3DO. This was an early example of a home console third-person shooter which featured a human protagonist on-foot, as opposed to controlling a vehicle, made use of polygonal 3D graphics along with sprites in a 3D environment. Fade to Black was a 3D third-person shooter released around this time, but as well as featuring an on-foot protagonist rather than a vehicle, utilised polygonal 3D graphics. Tomb Raider by Eidos Interactive is claimed by some commentators as a third-person shooter, Jonathan S. Harbour of the University of Advancing Technology argues that it's "largely responsible for the popularity of th
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. It is the largest and most capable navy in the world and it has been estimated that in terms of tonnage of its active battle fleet alone, it is larger than the next 13 navies combined, which includes 11 U. S. allies or partner nations. With the highest combined battle fleet tonnage and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction. With 319,421 personnel on active duty and 99,616 in the Ready Reserve, the Navy is the third largest of the service branches, it has 282 deployable combat vessels and more than 3,700 operational aircraft as of March 2018, making it the second-largest air force in the world, after the United States Air Force. The U. S. Navy traces its origins to the Continental Navy, established during the American Revolutionary War and was disbanded as a separate entity shortly thereafter.
The U. S. Navy played a major role in the American Civil War by blockading the Confederacy and seizing control of its rivers, it played the central role in the World War II defeat of Imperial Japan. The US Navy emerged from World War II as the most powerful navy in the world; the 21st century U. S. Navy maintains a sizable global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean, the Indian Ocean, it is a blue-water navy with the ability to project force onto the littoral regions of the world, engage in forward deployments during peacetime and respond to regional crises, making it a frequent actor in U. S. foreign and military policy. The Navy is administratively managed by the Department of the Navy, headed by the civilian Secretary of the Navy; the Department of the Navy is itself a division of the Department of Defense, headed by the Secretary of Defense. The Chief of Naval Operations is the most senior naval officer serving in the Department of the Navy.
The mission of the Navy is to maintain and equip combat-ready Naval forces capable of winning wars, deterring aggression and maintaining freedom of the seas. The U. S. Navy is a seaborne branch of the military of the United States; the Navy's three primary areas of responsibility: The preparation of naval forces necessary for the effective prosecution of war. The maintenance of naval aviation, including land-based naval aviation, air transport essential for naval operations, all air weapons and air techniques involved in the operations and activities of the Navy; the development of aircraft, tactics, technique and equipment of naval combat and service elements. U. S. Navy training manuals state that the mission of the U. S. Armed Forces is "to be prepared to conduct prompt and sustained combat operations in support of the national interest." As part of that establishment, the U. S. Navy's functions comprise sea control, power projection and nuclear deterrence, in addition to "sealift" duties, it follows as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, with it, everything honorable and glorious.
Naval power... is the natural defense of the United States The Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia; the rationale for establishing a national navy was debated in the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, make it easier to seek out support from foreign countries. Detractors countered that challenging the British Royal Navy the world's preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships and reported the captures to the Congress. On 13 October 1775, the Continental Congress authorized the purchase of two vessels to be armed for a cruise against British merchant ships. S. Navy; the Continental Navy achieved mixed results.
In August 1785, after the Revolutionary War had drawn to a close, Congress had sold Alliance, the last ship remaining in the Continental Navy due to a lack of funds to maintain the ship or support a navy. In 1972, the Chief of Naval Operations, Admiral Elmo Zumwalt, authorized the Navy to celebrate its birthday on 13 October to honor the establishment of the Continental Navy in 1775; the United States was without a navy for nearly a decade, a state of affairs that exposed U. S. maritime merchant ships to a series of attacks by the Barbary pirates. The sole armed maritime presence between 1790 and the launching of the U. S. Navy's first warships in 1797 was the U. S. Revenue-Marine, the primary predecessor of the U. S. Coast Guard. Although the USRCS conducted operations against the pirates, their depredations far outstripped its abilities and Congress passed the Naval Act of 1794 that established a permanent standing navy on 27 March 1794; the Naval Act ordered the construction and manning of six frigates and, by October 1797, the first three were brought into service: USS United States, USS Constellation, USS Constitution.
Due to his strong posture on having a strong standing Navy during this period, John Adams is "often called the father of the American Navy". In 1798–99 the Navy was involved in an undeclared Quasi-War with France. From 18
In sailing and warfare, hull-down means that the upper part of a vessel or vehicle is visible, but the main, lower body is not. The terms originated with sailing and naval warfare in which the curvature of the earth causes an approaching vessel to be first visible "sails-up". Beginning in the 20th century, hull-down has been used in armoured warfare. In modern armoured warfare, hull-down is a position taken up by an armoured fighting vehicle so that its hull is behind a crest or other raised ground, but its turret is exposed. Turret-down is the position in which the vehicle's crew can observe forward from roof hatches, but the vehicle is hidden; the belly armour should not be exposed, because it is vulnerable to modest antitank weapons. Due to the convexity of the earth, a ship's upper rigging will be visible at a much greater distance than its lower hull: for example, in clear air a lookout at the top of mast 130 feet above the water will be able to see the top of another 130 ft mast from over 24 nautical miles away, but will be able to see the full hull of the other ship from only 12 nautical miles away.
With a clear horizon, whether a vessel is hull-down or hull-up gives some idea of its distance from the observer, using the line-of-sight formula. In naval warfare, while the upper rigging or radio mast and stacks may give some idea of its type, it is impossible to tell the true nature of a ship when it is hull-down and its armament and size are not visible. During the age of sail, a naval vessel that chose to pursue a possible enemy vessel spotted hull-down ran the risk of unknowingly closing on a more powerful opponent — depending on the wind and other conditions, it might not be possible to flee once the other vessel was visible hull-up. Hull down was used to describe a commercial sailing vessel being under sail and loaded sailing briskly to windward. In modern armoured warfare, hull-down is a position taken up by an armoured fighting vehicle such that its hull is behind a crest or other raised ground, but its turret is exposed; this allows it to observe and fire upon the ground ahead, while the hull is protected from enemy fire behind hard cover.
A hull-down AFV is said to be in defilade. Taking advantage of hull-down positions is an element of tactical movement. Turret-down is the position in which the vehicle's crew can observe forward from roof hatches, but the vehicle is hidden; this can apply to vehicles without turrets. In flat or rolling terrain, a hull-down position is difficult to find; the actual protecting rise of ground may be hundreds of metres long. In steep or abrupt terrain cover is plentiful, but it may be difficult to find covered positions from which the vehicle's main gun can fire upon terrain ahead. In preparing defensive works, a hull-down position can be created or improved by digging shallow "tank scrapes". Tank units have one or two tanks with'dozer' blades attached for this purpose, some tank models have a built-in blade. Combat engineering vehicles accompany armoured vehicles as they manoeuvre to dig tank scrapes, as they can accomplish the task more quickly. Crossing a crest or ridge-line is a dangerous manoeuvre for AFVs, as they are exposed to enemy fire while silhouetted against the sky.
While cresting a steep slope, the thin armour on the front bottom of a tank's hull can be exposed to fire. After cresting, the thin top armour may be exposed. If an antitank gunner has spotted the AFV, they may train their sights on it and wait for an easy shot while it moves forward. After observing from a hull-down or turret-down position, an armoured vehicle will try to advance while minimizing these risks. If possible, it may reverse away from a crest, try to find a route forward through the relative safety of hidden low ground. If crossing a long crest is unavoidable, the vehicle can back down and jockey at least 50 metres across the covered back of the slope, before advancing over the crest at high speed. An enemy gunner will have little time to locate the target, train his sights on it, take the shot. If the terrain is hilly enough, the AFV can enter low ground advance through it to another hull-down position. Small armoured units make use of these tactics in co-ordinated fashion, when contact with the enemy is expected.
Since firing while moving was until impossible or ineffective, elements of a unit take turns moving and supporting each other from the halt. This is called mutual support, or fire and movement, related to the infantry tactic of leap-frogging, or, somewhat more loosely, the air combat tactic of flying with a wingman. Co-ordination is accomplished by hand signals or radio messages. Armed reconnaissance elements make much use of covered movement and stealth, while offensive units such as tanks move much more aggressively; when speed is paramount, modern tanks may dispense with fire and movement, move all at once. Tanks and other fighting vehicles must be able to depress their gun to be able to take advantage of a hull-down position, since a vehicle's hull is tilted upwards when it is behind a crest. A vehicle with a small
A military is a heavily-armed, highly-organised force intended for warfare known collectively as armed forces. It is officially authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform, it may consist of one or more military branches such as an Army, Air Force and in certain countries and Coast Guard. The main task of the military is defined as defence of the state and its interests against external armed threats. Beyond warfare, the military may be employed in additional sanctioned and non-sanctioned functions within the state, including internal security threats, population control, the promotion of a political agenda, emergency services and reconstruction, protecting corporate economic interests, social ceremonies and national honor guards. A nation's military may function as a discrete social subculture, with dedicated infrastructure such as military housing, utilities, hospitals, legal services, food production and banking services.
In broad usage, the terms "armed forces" and "military" are treated as synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include both its military and other paramilitary forces. There are various forms of irregular military forces; the profession of soldiering as part of a military is older than recorded history itself. Some of the most enduring images of classical antiquity portray the power and feats of its military leaders; the Battle of Kadesh in 1274 BC was one of the defining points of Pharaoh Ramses II's reign, his monuments commemorate it in bas-relief. A thousand years the first emperor of unified China, Qin Shi Huang, was so determined to impress the gods with his military might that he had himself buried with an army of terracotta soldiers; the Romans paid considerable attention to military matters, leaving to posterity many treatises and writings on the subject, as well as a large number of lavishly carved triumphal arches and victory columns.
Issue: Possibly cognate with Thousand, cf. Latin and Romance language root word "mil-")The first recorded use of the word military in English, spelled militarie, was in 1582, it comes from the Latin militaris through French, but is of uncertain etymology, one suggestion being derived from *mil-it- – going in a body or mass. The word is now identified as denoting someone, skilled in use of weapons, or engaged in military service, or in warfare; as a noun, the military refers to a country's armed forces, or sometimes, more to the senior officers who command them. In general, it refers to the physicality of armed forces, their personnel and the physical area which they occupy; as an adjective, military referred only to soldiers and soldiering, but it soon broadened to apply to land forces in general, anything to do with their profession. The names of both the Royal Military Academy and United States Military Academy reflect this. However, at about the time of the Napoleonic Wars,'military' began to be used in reference to armed forces as a whole, in the 21st century expressions like'military service','military intelligence', and'military history' encompass naval and air force aspects.
As such, it now connotes any activity performed by armed force personnel. Military history is considered to be the history of all conflicts, not just the history of the state militaries, it differs somewhat from the history of war, with military history focusing on the people and institutions of war-making, while the history of war focuses on the evolution of war itself in the face of changing technology and geography. Military history has a number of facets. One main facet is to learn from past accomplishments and mistakes, so as to more wage war in the future. Another is to create a sense of military tradition, used to create cohesive military forces. Still, another may be to learn to prevent wars more effectively. Human knowledge about the military is based on both recorded and oral history of military conflicts, their participating armies and navies and, more air forces. There are two types of military history, although all texts have elements of both: descriptive history, that serves to chronicle conflicts without offering any statements about the causes, nature of conduct, the ending, effects of a conflict.
Despite the growing importance of military technology, military activity depends above all on people. For example, in 2000 the British Army declared: "Man is still the first weapon of war." The military organization is characterized by a strict hierarchy divided by military rank, with ranks grouped as officers, non-commissioned officers, personnel at the lowest rank. While senior officers make strategic decisions, subordinated military personnel fulfil them. Although rank titles vary by military branch and country, the rank hierarchy is common to all state armed forces worldwide. In addition to their rank, personnel occupy one of many trade roles, which are grouped according to
United States Air Force
The United States Air Force is the aerial and space warfare service branch of the United States Armed Forces. It is one of the five branches of the United States Armed Forces, one of the seven American uniformed services. Formed as a part of the United States Army on 1 August 1907, the USAF was established as a separate branch of the U. S. Armed Forces on 18 September 1947 with the passing of the National Security Act of 1947, it is the youngest branch of the U. S. Armed Forces, the fourth in order of precedence; the USAF is the largest and most technologically advanced air force in the world. The Air Force articulates its core missions as air and space superiority, global integrated intelligence and reconnaissance, rapid global mobility, global strike, command and control; the U. S. Air Force is a military service branch organized within the Department of the Air Force, one of the three military departments of the Department of Defense; the Air Force, through the Department of the Air Force, is headed by the civilian Secretary of the Air Force, who reports to the Secretary of Defense, is appointed by the President with Senate confirmation.
The highest-ranking military officer in the Air Force is the Chief of Staff of the Air Force, who exercises supervision over Air Force units and serves as one of the Joint Chiefs of Staff. Air Force components are assigned, as directed by the Secretary of Defense, to the combatant commands, neither the Secretary of the Air Force nor the Chief of Staff of the Air Force have operational command authority over them. Along with conducting independent air and space operations, the U. S. Air Force provides air support for land and naval forces and aids in the recovery of troops in the field; as of 2017, the service operates more than 5,369 military aircraft, 406 ICBMs and 170 military satellites. It has a $161 billion budget and is the second largest service branch, with 318,415 active duty airmen, 140,169 civilian personnel, 69,200 reserve airmen, 105,700 Air National Guard airmen. According to the National Security Act of 1947, which created the USAF: In general, the United States Air Force shall include aviation forces both combat and service not otherwise assigned.
It shall be organized and equipped for prompt and sustained offensive and defensive air operations. The Air Force shall be responsible for the preparation of the air forces necessary for the effective prosecution of war except as otherwise assigned and, in accordance with integrated joint mobilization plans, for the expansion of the peacetime components of the Air Force to meet the needs of war. §8062 of Title 10 US Code defines the purpose of the USAF as: to preserve the peace and security, provide for the defense, of the United States, the Territories and possessions, any areas occupied by the United States. The stated mission of the USAF today is to "fly and win...in air and cyberspace". "The United States Air Force will be a trusted and reliable joint partner with our sister services known for integrity in all of our activities, including supporting the joint mission first and foremost. We will provide compelling air and cyber capabilities for use by the combatant commanders. We will excel as stewards of all Air Force resources in service to the American people, while providing precise and reliable Global Vigilance and Power for the nation".
The five core missions of the Air Force have not changed since the Air Force became independent in 1947, but they have evolved, are now articulated as air and space superiority, global integrated intelligence and reconnaissance, rapid global mobility, global strike, command and control. The purpose of all of these core missions is to provide, what the Air Force states as, global vigilance, global reach, global power. Air superiority is "that degree of dominance in the air battle of one force over another which permits the conduct of operations by the former and its related land, sea and special operations forces at a given time and place without prohibitive interference by the opposing force". Offensive Counterair is defined as "offensive operations to destroy, disrupt, or neutralize enemy aircraft, launch platforms, their supporting structures and systems both before and after launch, but as close to their source as possible". OCA is the preferred method of countering air and missile threats since it attempts to defeat the enemy closer to its source and enjoys the initiative.
OCA comprises attack operations, sweep and suppression/destruction of enemy air defense. Defensive Counter air is defined as "all the defensive measures designed to detect, identify and destroy or negate enemy forces attempting to penetrate or attack through friendly airspace". A major goal of DCA operations, in concert with OCA operations, is to provide an area from which forces can operate, secure from air and missile threats; the DCA mission comprises both passive defense measures. Active defense is "the employment of limited offensive action and counterattacks to deny a contested area or position to the enemy", it includes both ballistic missile defense and air-breathing threat defense, encompasses point defense, area defense, high-value airborne asset defense. Passive defense is "measures taken to reduce the probability of and to minimize the effects of damage caused by hostile action without the intention of taking the initiative", it includes warning.
First-person shooter is a video game genre centered around gun and other weapon-based combat in a first-person perspective. The genre shares common traits with other shooter games, which in turn makes it fall under the heading action game. Since the genre's inception, advanced 3D and pseudo-3D graphics have challenged hardware development, multiplayer gaming has been integral; the first-person shooter genre has been traced as far back as Maze War, development of which began in 1973, 1974's Spasim. And after more playful titles like MIDI Maze in 1987, the genre coalesced into a more violent form with 1992's Wolfenstein 3D, credited with creating the genre's basic archetype upon which subsequent titles were based. One such title, the progenitor of the genre's wider mainstream acceptance and popularity was Doom, one of the most influential games in this genre. Corridor shooter was another common name for the genre in its early years, since processing limitations of the era's hardware meant that most of the action in the games had to take place in enclosed areas.1998's Half-Life—along with its 2004 sequel Half-Life 2—enhanced the narrative and puzzle elements.
In 1999, the Half-Life mod Counter-Strike was released and, together with Doom, is one of the most influential first-person shooters. GoldenEye 007, released in 1997, was a landmark first-person shooter for home consoles, while the Halo series heightened the console's commercial and critical appeal as a platform for first-person shooter titles. In the 21st century, the first-person shooter is the most commercially viable video game genre, in 2016, shooters accounted for over 27% of all video game sales. Several first-person shooters have been popular games for eSports and competitive gaming competitions as well. First-person shooters are a type of three-dimensional shooter game, featuring a first-person point of view with which the player sees the action through the eyes of the player character, they are unlike third-person shooters, in which the player can see the character they are controlling. The primary design element is combat involving firearms. First person-shooter games are often categorized as being distinct from light gun shooters, a similar genre with a first-person perspective which use light gun peripherals, in contrast to first-person shooters which use conventional input devices for movement.
Another difference is that first-person light-gun shooters like Virtua Cop feature "on-rails" movement, whereas first-person shooters like Doom give the player more freedom to roam. The first-person shooter may be considered a distinct genre itself, or a type of shooter game, in turn a subgenre of the wider action game genre. Following the release of Doom in 1993, games in this style were termed "Doom clones". Wolfenstein 3D, released in 1992, the year before Doom, has been credited with introducing the genre, but critics have since identified similar though less advanced games developed as far back as 1973. There are occasional disagreements regarding the specific design elements which constitute a first-person shooter. For example, Deus Ex or BioShock may be considered as first-person shooters, but may be considered role-playing video games as they borrow from this genre extensively. Certain puzzle games like Portal are called first-person shooters, but lack any direct combat or shooting element, instead using the first-person perspective to help immerse players within the game to help solve puzzles.
Some commentators extend the definition to include combat flight simulators where the cockpit or vehicle takes place of the hands and weapons. Like most shooter games, first-person shooters involve an avatar, one or more ranged weapons, a varying number of enemies; because they take place in a 3D environment, these games tend to be somewhat more realistic than 2D shooter games, have more accurate representations of gravity, lighting and collisions. First-person shooters played on personal computers are most controlled with a combination of a keyboard and mouse; this system has been claimed as superior to that found in console games, which use two analog sticks: one used for running and sidestepping, the other for looking and aiming. It is common to display the character's hands and weaponry in the main view, with a head-up display showing health and location details, it is possible to overlay a map of the surrounding area. First-person shooters focus on action gameplay, with fast-paced and bloody firefights, though some place a greater emphasis on narrative, problem-solving and logic puzzles.
In addition to shooting, melee combat may be used extensively. In some games, melee weapons are powerful, a reward for the risk the player must take in maneuvering his character into close proximity to the enemy. In other situations, a melee weapon may be necessary as a last resort. "Tactical shooters" are more realistic, require teamwork and strategy to succeed. First-person shooters give players a choice of weapons, which have a large impact on how the player will approach the game; some game designs have realistic models of actual existing or historical weapons, incorporating their rate of fire, magazine size, ammunition amount and accuracy. Other first-person shooter games may incorporate imaginative variations of weapons, including future prototypes, "alien te
A firearm is a portable gun that inflicts damage on targets by launching one or more projectiles driven by expanding high-pressure gas produced chemically by exothermic combustion of propellant within an ammunition cartridge. If gas pressurization is achieved through mechanical gas compression rather than through chemical propellant combustion the gun is technically an air gun, not a firearm; the first primitive firearms originated in 10th-century China when bamboo tubes containing gunpowder and pellet projectiles were mounted on spears into the one-person-portable fire lance, used as a shock weapon to good effect in the Siege of De'an in 1132. In the 13th century the Chinese invented the metal-barrelled hand cannon considered the true ancestor of all firearms; the technology spread through the rest of East Asia, South Asia, the Middle East, Europe. Older firearms 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 in the case of shotguns by their gauge. Further classification may make reference to the type of barrel used and to the barrel length, to the firing mechanism, to the design's primary intended use, or to the accepted name for a particular variation. Shooters aim firearms at their targets with hand-eye coordination, using either iron sights or optical sights; the accurate range of pistols does not exceed 110 yards, while most rifles are accurate to 550 yards using iron sights, or to longer ranges using optical sights. Purpose-built sniper rifles and anti-materiel rifles are accurate to ranges of more than 2,200 yards. Firearms include a variety of ranged weapons and there is no agreed upon definition. Many soldiers consider a firearm to be any ranged weapon that uses gunpowder or a derivative as a propellant. Small arms include handguns and long guns, such as rifles, submachine guns, personal defense weapons, squad automatic weapons, light machine guns; the world's top small arms manufacturing companies are Browning, Colt, Smith & Wesson, Mossberg, Heckler & Koch, SIG Sauer, Walther, ČZUB, Steyr-Mannlicher, FN Herstal, Norinco, Tula Arms and Kalashnikov, while former top producers were Mauser, Springfield Armory, Rock Island Armory under Armscor.
In 2018, Small Arms Survey reported that there are over one billion small arms distributed globally, of which 857 million are in civilian hands. U. S. civilians alone account for 393 million of the worldwide total of civilian held firearms. This amounts to "120.5 firearms for every 100 residents." The world's armed forces control about 133 million of the global total of small arms, of which over 43 percent belong to two countries: the Russian Federation and China. Law enforcement agencies control about 23 million of the global total of small arms; the smallest of all firearms is the handgun. There are two common types of handguns: semi-automatic pistols. Revolvers have "charge holes" in a revolving cylinder. Semi-automatic pistols have a single fixed firing chamber machined into the rear of the barrel, a magazine so they can be used to fire more than one round; each press of the trigger 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 same end using a mechanical action linked to the trigger pull. Prior to the 19th century 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 supplanted revolvers in military applications by the end of World War I. By the end of the 20th century, most handguns carried by military and civilians were semi-automatic, although revolvers were still used. Speaking and police forces use semi-automatic pistols due to their high magazine capacities and ability to reload by removing the empty magazine and inserting a loaded one. Revolvers are common among handgun hunters because revolver cartridges are more powerful than similar caliber semi-automatic pistol cartridges and the strength and durability of the revolver design is well-suited to outdoor use. Revolvers in.22 LR and 38 Special/357 Magnum, are common concealed weapons in j