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Polymer-cased Ammunition
Polymer-cased ammunition (PCA) is firearm ammunition (cartridge) with casings made from synthetic polymer instead of the typical metallic casing. PCA is considered a new alternative that potentially reduces production cost and weight for long guns and handguns. Origin The first references to the possible use of polymers in the manufacture of casings come from the early 1950s. One of the earliest is the patent filed by Jack W. Roske in 1950 and the idea was to use a metal cup joined with a polymer shell "that will be converted to gas during the firing phase to assist in propelling the projectile and thereby permit reduction in the use of the propelling powder charge". Examples * The majority of commonly found shotgun shell hulls are constructed of polymer with metal only found on the lower or rim portions of the shells. * The Steyr ACR was a notable user of polymer cased ammunition. * The US Army ARDEC developed a 5.56mm Telescoped ammunition for its LSAT program. * The Assist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olin Winchester CT
Olin may refer to: People Organizations * OLIN, American landscape architecture firm * Olin Business School at Washington University in St. Louis * Olin College, an undergraduate engineering college in Massachusetts * Olin Corporation, a chemical corporation with a history of producing chemicals and ammunition * Olin Edirne, the former name of Turkish basketball team Eskişehir Basket * F. W. Olin Foundation, a foundation endowed by Franklin W. Olin * John M. Olin Foundation, a foundation endowed by John M. Olin * Preston and Olin Institute, a defunct Methodist boys' school now a part of Virginia Tech Places * Olin, Iowa, a small city in the United States * Olin, North Carolina, an unincorporated community in the United States * Olin, Poland * Olin's Covered Bridge, the only bridge in Ashtabula county, Ohio named for a family * Olin Observatory, an astronomical observatory in New London, Connecticut * Olin Sang Ruby Union Institute, a Jewish overnight summer camp in Wisconsin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
223 Rem
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caliber
In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimetres, millimeters. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a "45 caliber" firearm has a barrel diameter of roughly . Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise specifications in non-metric units, and vice versa. In a rifling , rifled barrel, the distance is measured between opposing Rifling#C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
338 Norma Mag
__NOTOC__ Year 338 ( CCCXXXVIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Ursus and Polemius (or, less frequently, year 1091 ''Ab urbe condita''). The denomination 338 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * The Romans, allied with the Goths, arrive in the north of the Roman Empire to protect the Danube frontier. * Emperor Constantius II intervenes against the Persians in Armenia. Persia * Shapur II, king of the Persian Empire, begins a widespread persecution of Christians. He orders forcible conversions to the state religion, Zoroastrianism, lest the Christians disrupt his realm while he is away fighting the Romans in Armenia and Mesopotamia. Asia * Tuoba Yihuai, ruler of the Tuoba Dai clan, dies and is succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lightweight Medium Machine Gun
The Lightweight Medium Machine Gun (LWMMG) is a prototype machine gun being developed first by General Dynamics, later by LoneStar Future Weapons, now by True Velocity Design The LWMMG is designed to fill the gap between 7.62 mm and .50 BMG machine guns. The weapon uses the .338 Norma Magnum round, giving it greater lethality and double the range of the 7.62 NATO round. The LWMMG has a rate of fire of 500 rounds per minute, an effective range of 1,700 meters (1,860 yards), and a maximum range of 5,642 meters (6,170 yards). It weighs 24 pounds (10.8 kg), making it only slightly heavier than the M240L, and lighter than the M240B. The .338NM bullet has over of muzzle energy and is four times more powerful than the 7.62 NATO at 1,000 meters. An individual round is twice as heavy (45.5 grams compared to 24 grams), as are each belt link (8 grams compared to 4 grams). For each weapon to fire for one minute, the standard LWMMG weighing plus a belt of 500 .338NM rounds woul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M134 Minigun
The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). It features a Gatling-style rotating barrel assembly with an external power source, normally an electric motor. The "Mini" in the name is in comparison to larger-caliber designs that use a rotary barrel design, such as General Electric's earlier 20 mm M61 Vulcan, and "gun" for the use of rifle ammunition as opposed to autocannon shells. "Minigun" refers to a specific model of weapon that General Electric originally produced, but the term "minigun" has popularly come to refer to any externally powered rotary gun of rifle caliber. The term is sometimes used loosely to refer to guns of similar rates of fire and configuration, regardless of power source and caliber. The Minigun is used by several branches of the U.S. military. Versions are designated ''M134'' and ''XM196'' by the United States Army, and ''GAU-2/A'' and ''GAU-17/A'' by the U.S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M240 Machine Gun
The M240 – officially the Machine Gun, 7.62 mm, M240 – is the U.S. military designation for the FN MAG, a family of belt-fed, gas-operated medium machine guns that chamber the 7.62×51mm NATO cartridge. The M240 has been used by the United States Armed Forces since the late 1970s. It is used extensively by infantry, most often in rifle companies, as well as on ground vehicles, watercraft and aircraft. Though it is heavier than some comparable weapons, it is highly regarded for reliability and its standardization among NATO members is a major advantage. All variants are fed from disintegrating belts and are capable of firing most types of 7.62 mm (.30/.308 cal) NATO ammunition. M240 variants can be converted to use non-disintegrating belts. There are significant differences in weight and some features among some versions which restrict the interchangeability of parts. The M240s used by the U.S. military are currently manufactured by FN America, the American s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M110 Semi-Automatic Sniper System
The M110 Semi Automatic Sniper System (M110 SASS) is an American semi-automatic precision rifle that is chambered for the 7.62×51mm NATO round. It is manufactured by Knight's Armament Company, developed from the Knight's Armament Company SR-25, and adopted by the U.S. military following the 2005 US Army Semi-Automatic Sniper Rifle (XM110 SASR) competition. The M110 was to be replaced by the lighter and more compact M110A1 CSASS, which is developed from the G28, a variant of the Heckler & Koch HK417, however, most M110A1 models fielded have been of the SDMR variant. In 2021, a newer variant, the M110A2, was showcased and seen in use in early 2022. Overview The M110 Semi-Automatic Sniper System is intended to replace the M24 Sniper Weapon System used by snipers, spotters, designated marksmen, or squad advanced marksmen in the United States Army. However, the U.S. Army still acquired M24s from Remington until February 2010. After witnessing the effects of USSOCOM snipers a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Dynamics
General Dynamics Corporation (GD) is an American publicly traded, aerospace and defense corporation headquartered in Reston, Virginia. As of 2020, it was the fifth-largest defense contractor in the world by arms sales, and 5th largest in the United States by total sales. The company is a Fortune 100 company, and was ranked No. 94 in 2022. Formed in 1954 with the merger of submarine manufacturer Electric Boat and aircraft manufacturer Canadair, the corporation today consists of ten subsidiary companies with operations in 45 countries. The company's products include Gulfstream business jets, Virginia- and Columbia-class nuclear-powered submarines, Arleigh Burke-class guided-missile destroyers, M1 Abrams tanks and Stryker armored fighting vehicles. In 2021, General Dynamics had worldwide sales of $38.85 billion and a workforce of approximately 103,000 full-time employees. The current chairman and chief executive officer (CEO) is Phebe Novakovic. History Electric Boat Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
