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Polygonal Rifling
Polygonal rifling ( ) is a type of gun barrel rifling where the traditional sharp-edged "lands and grooves" are replaced by less pronounced "hills and valleys", so the barrel bore has a polygonal (usually hexagonal or octagonal) cross-sectional profile. Polygonal riflings with a larger number of edges have shallower corners, which provide a better gas seal in relatively large diameter bores. For instance, in the pre-Gen 5 Glock pistols, octagonal rifling is used in the large diameter .45 ACP bore, which has an 11.23 mm (0.442 in) diameter, since it resembles a circle more closely than the hexagonal rifling used in smaller diameter bores.Barrel History History [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygonal Vs Normal Rifling
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed ''polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two together, may be called a polygon. The segments of a polygonal circuit are called its '' edges'' or ''sides''. The points where two edges meet are the polygon's '' vertices'' (singular: vertex) or ''corners''. The interior of a solid polygon is sometimes called its ''body''. An ''n''-gon is a polygon with ''n'' sides; for example, a triangle is a 3-gon. A simple polygon is one which does not intersect itself. Mathematicians are often concerned only with the bounding polygonal chains of simple polygons and they often define a polygon accordingly. A polygonal boundary may be allowed to cross over itself, creating star polygons and other self-intersecting polygons. A polygon is a 2-dimensional example of the more general polytope in any num ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Whitworth
Sir Joseph Whitworth, 1st Baronet (21 December 1803 – 22 January 1887) was an English engineer, entrepreneur, inventor and philanthropist. In 1841, he devised the British Standard Whitworth system, which created an accepted standard for screw threads. Whitworth also created the Whitworth rifle, often called the " sharpshooter" because of its accuracy, which is considered one of the earliest examples of a sniper rifle. Whitworth was created a baronet by Queen Victoria in 1869. Upon his death in 1887, Whitworth bequeathed much of his fortune for the people of Manchester, with the Whitworth Art Gallery and Christie Hospital partly funded by Whitworth's money. Whitworth Street and Whitworth Hall in Manchester are named in his honour. Whitworth's company merged with the W.G. Armstrong & Mitchell Company to become Armstrong Whitworth in 1897. Biography Early life Whitworth was born in John Street, Stockport, Cheshire, where the Stockport Courthouse is today. The site is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sniper Rifle
A sniper rifle is a high-precision, long-range rifle. Requirements include accuracy, reliability, mobility, concealment and optics for anti-personnel, anti-materiel and surveillance uses of the military sniper. The modern sniper rifle is a portable shoulder-fired weapon system with a choice between bolt-action or semi-automatic action, fitted with a telescopic sight for extreme accuracy and chambered for a high-ballistic performance centerfire cartridge. History The Whitworth rifle was arguably the first long-range sniper rifle in the world. Designed by Sir Joseph Whitworth, a prominent British engineer, it used barrels with hexagonal polygonal rifling, which meant that the projectile did not have to bite into the rifling grooves as was done with conventional rifling. His rifle was far more accurate than the Pattern 1853 Enfield, which had shown some weaknesses during the recent Crimean War. At trials in 1857, which tested the accuracy and range of both weapons, Whitworth's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharps Rifle
Sharps rifles are a series of large-bore, single-shot, falling-block, breech-loading rifles, beginning with a design by Christian Sharps in 1848 and ceasing production in 1881. They were renowned for long-range accuracy. By 1874 the rifle was available in a variety of calibers, and it was one of the few designs to be successfully adapted to metallic cartridge use. The Sharps rifles became icons of the American Old West with their appearances in many Western-genre films and books. Perhaps as a result, several rifle companies offer reproductions of the Sharps rifle. History Sharps' initial rifle was patented September 12, 1848, and manufactured by A. S. Nippes at Mill Creek in Philadelphia Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since ..., Pennsylvania, in 1850. The second mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breechloading
A breechloader is a firearm in which the user loads the ammunition (cartridge or shell) via the rear (breech) end of its barrel, as opposed to a muzzleloader, which loads ammunition via the front ( muzzle). Modern firearms are generally breech-loading – except for replicas of vintage weapons. Early firearms before the mid-19th century were almost entirely muzzle-loading. Mortars and the Russian GP-25 grenade launcher are the only muzzleloaders remaining in frequent modern usage. However, referring to a weapon specifically as breech loading is mostly limited to single-shot or otherwise non-repeating firearms, such as double-barreled shotguns. Breech-loading provides the advantage of reduced reloading time, because it is far quicker to load the projectile and propellant into the chamber of a gun/cannon than to reach all the way over to the front end to load ammunition and then push them back down a long tube – especially when the projectile fits tightly and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle-loading
A muzzleloader is any firearm into which the projectile and the propellant charge is loaded from the muzzle of the gun (i.e., from the forward, open end of the gun's barrel). This is distinct from the modern (higher tech and harder to make) designs of breech-loading firearms. The term "muzzleloader" applies to both rifled and smoothbore type muzzleloaders, and may also refer to the marksman who specializes in the shooting of such firearms. The firing methods, paraphernalia and mechanism further divide both categories as do caliber (from cannons to small-caliber palm guns). Modern muzzleloading firearms range from reproductions of sidelock, flintlock and percussion long guns, to in-line rifles that use modern inventions such as a closed breech, sealed primer and fast rifling to allow for considerable accuracy at long ranges. Modern mortars use a shell with the propelling charge and primer attached at the base. Unlike older muzzleloading mortars, which were loaded the same way as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Army
During the American Civil War, the Union Army, also known as the Federal Army and the Northern Army, referring to the United States Army, was the land force that fought to preserve the Union of the collective states. It proved essential to the preservation of the United States as a working, viable republic. The Union Army was made up of the permanent regular army of the United States, but further fortified, augmented, and strengthened by the many temporary units of dedicated volunteers, as well as including those who were drafted in to service as conscripts. To this end, the Union Army fought and ultimately triumphed over the efforts of the Confederate States Army in the American Civil War. Over the course of the war, 2,128,948 men enlisted in the Union Army, including 178,895 colored troops; 25% of the white men who served were immigrants, and further 25% were first generation Americans.McPherson, pp.36–37. Of these soldiers, 596,670 were killed, wounded or went missing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitworth Sharpshooters
Whitworth Sharpshooters were the Confederates' answer to the Union sharpshooter regiments, and they used the British Whitworth rifle. These men accompanied regular infantrymen and their occupation was usually eliminating Union artillery gun crews. Whitworth rifle The Whitworth rifle proved to be an accurate and deadly instrument. Its most remembered act was on May 9, 1864 at the Battle of Spotsylvania Court House, where Union General John Sedgwick urged his men to leave a ditch in which they lay in order to cover from the Confederate snipers hidden 800 to 1000 yards away. According to Martin T. McMahon, Brevet Major-General, U.S.V. hief-of-Staff, Sixth Corps he and General Sedgwick were walking along the line when he edgwick Edgwick is a residential area of Coventry, West Midlands, England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the ...noticed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confederate States Army
The Confederate States Army, also called the Confederate Army or the Southern Army, was the military land force of the Confederate States of America (commonly referred to as the Confederacy) during the American Civil War (1861–1865), fighting against the United States forces to win the independence of the Southern states and uphold the institution of slavery. On February 28, 1861, the Provisional Confederate Congress established a provisional volunteer army and gave control over military operations and authority for mustering state forces and volunteers to the newly chosen Confederate president, Jefferson Davis. Davis was a graduate of the U.S. Military Academy, and colonel of a volunteer regiment during the Mexican–American War. He had also been a United States senator from Mississippi and U.S. Secretary of War under President Franklin Pierce. On March 1, 1861, on behalf of the Confederate government, Davis assumed control of the military situation at Charleston, South ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitworth Rifle
The Whitworth rifle was an English-made percussion rifle used in the latter half of the 19th century. A single-shot muzzleloader with excellent long-range accuracy for its era, especially when used with a telescopic sight, the Whitworth rifle was widely regarded as the world's first sniper rifle. The Whitworth rifle saw extensive use with the Confederate sharpshooters in the American Civil War, claiming the lives of several Union generals, including Major General John Sedgwick, one of the highest-ranking Union officers killed during the Civil War, shot on 9 May 1864, at Spotsylvania. In October 2017, a surviving example of a Confederate Whitworth rifle was auctioned with a hammer price of $161,000. The Whitworth rifle was considered to be the very best rifle of its time in terms of accuracy, when compared to other British, French, American rifles, or those produced elsewhere. History The Whitworth rifle was designed by Sir Joseph Whitworth, a prominent British engine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Civil War
The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states that had seceded. The central cause of the war was the dispute over whether slavery would be permitted to expand into the western territories, leading to more slave states, or be prevented from doing so, which was widely believed would place slavery on a course of ultimate extinction. Decades of political controversy over slavery were brought to a head by the victory in the 1860 U.S. presidential election of Abraham Lincoln, who opposed slavery's expansion into the west. An initial seven southern slave states responded to Lincoln's victory by seceding from the United States and, in 1861, forming the Confederacy. The Confederacy seized U.S. forts and other federal assets within their borders. Led by Confederate President Jefferson Da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pattern 1853 Enfield
The Enfield Pattern 1853 rifle-musket (also known as the Pattern 1853 Enfield, P53 Enfield, and Enfield rifle-musket) was a .577 calibre Minié-type muzzle-loading rifled musket, used by the British Empire from 1853 to 1867; after which many were replaced in service by the cartridge-loaded Snider–Enfield rifle. History and development The term "rifle-musket" originally referred to muskets with the smooth-bored barrels replaced with rifled barrels. The length of the barrels were unchanged, allowing the weapons to be fired in ranks, since a long rifle was necessary to enable the muzzles of the second rank of soldiers to project beyond the faces of the men in front. The weapon would also be sufficiently long when fitted with a bayonet to be effective against cavalry. Such weapons manufactured with rifled barrels, muzzle loading, single shot, and utilizing the same firing mechanism, also came to be called rifle-muskets. Royal Small Arms Factory developed the Pattern 1853 Enfie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
