1.
Bushmaster Firearms International
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Bushmaster Firearms International, LLC, based in Madison, North Carolina, United States, is a manufacturer and distributor of firearms. The companys product line revolves around semi-automatic pistol and rifle variants of the M4 / AR-15 design, Bushmaster Firearms was a company in Bangor, Maine, that went bankrupt and was purchased by Richard Dyke in 1976 and moved to Windham, Maine. According to a Maine newspaper, it was sold by Dyke to Cerberus while Krause Publications says it was first acquired by Quality Products Company. Dyke would sell the business in 2006 for 70 million dollars to Cerberus Capital Management, the company became part of the Freedom Group, owned by Cerberus Capital Management, in April 2006. In December 2010, Freedom Group announced that operations at the Windham, Maine, facility would cease as of March 2011. Windham Weaponry was founded by the former Bushmaster owners in 2011 in Windham, in December 2012, Cerberus Capital Management announced its intention to sell Bushmasters parent company, Freedom Group. In a press release, Cerberus stated that they would retain a financial advisor to design, Cerberus indicated that the decision to sell the company stemmed from publicity surrounding the use of a Bushmaster rifle in the Sandy Hook Elementary School shooting. According to the company, It is apparent that the Sandy Hook tragedy was a event that has raised the national debate on gun control to an unprecedented level. Cerberus announced in late 2013 that it had failed to deliver on its promise to divest itself of the Freedom Arms group and has come up with a plan to buy out some Cerberus investors. Those who chose to give up their shares would get paid off by an unidentified lender. Bushmasters firearms, such as the XM-15 line, are offered in a 5.56 NATO chambering with forged aircraft-grade aluminum receivers. Most Bushmaster barrels are 4150 steel, offered in 1,9 twist rate, some barrels are available with 1,7 rifling, on special order. Stainless steel or chrome molybdenum barrels are available on certain models and their name is not related to the Bushmaster autocannon. Bushmaster Firearms originally produced their First Generation rifle using an aluminum lower receiver paired to a steel upper receiver. Originally marketed for police and the military, Bushmaster later changed its unique hybrid version AR-15/M-16 to the standard Colt/Armalite design, the First Generation rifles were chambered for the 5. 56mm round. Bushmaster First Generation rifles are rare and are collectibles. In 2002, the company was the target of a lawsuit involving one of its rifles. A stolen Bushmaster XM-15.223 caliber rifle was used in the attacks, the company cited mounting legal fees as the reason for settling. According to the company in 2010, Bushmaster began making the ACR available to the civilian market, posting it on its website
2.
M16 rifle
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The M16 rifle, officially designated Rifle, Caliber 5.56 mm, M16, is a United States military adaptation of the Armalite AR-15 rifle. The original M16 was a select-fire,5. 56×45mm rifle with a 20-round magazine, in 1964, the M16 entered American military service and the following year was deployed for jungle warfare operations during the Vietnam War. In 1969, the M16A1 replaced the M14 rifle to become the U. S. militarys standard service rifle, the M16A1 improvements include a bolt-assist, chrome plated bore and a new 30-round magazine. In 1983, the USMC adopted the M16A2 rifle and the U. S. Army adopted it in 1986, the M16A2 fires the improved 5. Adopted in 1998, the M16A4 is the generation of the M16 series. It is equipped with a carrying handle and Picatinny rail for mounting optics. The M16 has also widely adopted by other militaries around the world. Total worldwide production of M16s has been approximately 8 million, making it the most-produced firearm of its 5.56 mm caliber. The U. S. Army has largely replaced the M16 in combat units with the shorter and lighter M4 carbine, however, early experiments with select-fire versions of the M1 Garand proved disappointing. During the Korean War, the select-fire M2 carbine largely replaced the gun in US service. However, combat experience suggested that the.30 Carbine round was under-powered, American weapons designers concluded that an intermediate round was necessary, and recommended a small-caliber, high-velocity cartridge. This culminated in the development of the 7. 62×51mm NATO cartridge, the US also adopted the M60 general purpose machine gun. Its NATO partners adopted the FN FAL and HK G3 rifles, as well as the FN MAG, the first confrontations between the AK-47 and the M14 came in the early part of the Vietnam War. Battlefield reports indicated that the M14 was uncontrollable in full-auto and that soldiers could not carry enough ammo to maintain fire superiority over the AK-47, and, while the M2 carbine offered a high rate of fire, it was under-powered and ultimately outclassed by the AK-47. A replacement was needed, a medium between the traditional preference for high-powered rifles such as the M14, and the firepower of the M2 Carbine. As a result, the Army was forced to reconsider a 1957 request by General Willard G. Wyman, continental Army Command to develop a.223 caliber select-fire rifle weighing 6 lb when loaded with a 20-round magazine. This request ultimately resulted in the development of a version of the Armalite AR-10. However, despite overwhelming evidence that the AR-15 could bring more firepower to bear than the M14, in January 1963, Secretary of Defense Robert McNamara concluded that the AR-15 was the superior weapon system and ordered a halt to M14 production
3.
Colt AR-15
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The Colt AR-15 is a lightweight,5. 56×45mm, magazine-fed, air-cooled semi-automatic, gas-operated rifle with a rotating bolt. It was designed to be manufactured with the use of aluminum alloys. Introduced in 1964, Colt has made many different types of AR-15 rifle and carbine models, including the AR-15, AR-15A2, AR-15A3, Sporter, HBAR, Government, Target, Match and it is based on the ArmaLite AR-15 rifle, a select-fire weapon intended for military sales. In 1959, ArmaLite sold the design to Colt due to financial difficulties, after some modifications, the rifle eventually became the United States military M16 rifle. Shortly thereafter, Colt began to make semi-automatic versions for civilian sales, the term AR-15 is a Colt registered trademark, which they use to denote only the semi-automatic rifle versions available for civilian and law enforcement sales. The term AR-15 signifies Armalite rifle, design 15, other manufacturers make AR-15 clones and variants marketed under separate designations, although these are frequently referred to as AR-15s. This article discusses the semiautomatic version manufactured by Colt, the Colt AR-15 is based on the 5.56 mm ArmaLite AR-15 rifle, which is a smaller lighter version of the 7.62 mm ArmaLite AR-10. Both of these rifles were designed by Eugene Stoner, Robert Fremont, in 1959, ArmaLite sold its rights to the AR-10 and AR-15 to Colt. After a Far East tour, Colt made its first sale of Colt made ArmaLite AR-15 rifles to Malaya on September 30,1959, Colt manufactured their first batch of 300 select-fire Colt ArmaLite AR-15 Model 01 rifles in December 1959. Colt marketed the Colt made ArmaLite AR-15 rifle to various military services around the world, after modifications, the new redesigned rifle was adopted by the United States military as the M16 rifle. Most Colt ArmaLite AR-15 rifles in U. S. service have long ago been upgraded to M16 rifle configuration, Colt continued to use the AR-15 trademark for its semi-automatic variants that were marketed to civilian and law-enforcement customers. The original AR-15 was a lightweight weapon, weighing less than 6 pounds with empty magazine. Later heavy-barrel versions of the civilian AR-15 can weigh upwards of 8.5 lb, patent 2,951,424 describes the cycling mechanism used in the original AR-15. The bolt carrier acts as a cylinder and the bolt itself acts as a stationary piston. This mechanism is called direct gas impingement, although it differs from prior gas systems. Stoner did not consider the AR-15 to be a direct impingement mechanism. Gas is tapped from the barrel as the bullet moves past a gas port located above the front sight base. The gas expands into the port and down a gas tube, here, the gas tube protrudes into a gas key, which accepts the gas and funnels it into the bolt carrier
4.
Magazine (firearms)
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A magazine is an ammunition storage and feeding device within or attached to a repeating firearm. Magazines can be removable or integral to the firearm, the magazine functions by moving the cartridges stored in the magazine into a position where they may be loaded into the chamber by the action of the firearm. The detachable magazine is often referred to as a clip, although this is technically inaccurate, magazines come in many shapes and sizes, from those of bolt-action express rifles that hold only a few rounds to drum magazines for self-loading rifles that can hold one hundred rounds or more. Various jurisdictions ban what they define as high-capacity magazines, with the increased use of semi-automatic and automatic firearms, the detachable box magazine became increasingly common. Soon after the adoption of the M1911 pistol, the magazine was settled on by the military and firearms experts. The defining difference between clips and magazines is the presence of a mechanism in a magazine, typically a spring-loaded follower. Use of the clip to refer to detachable magazines is a point of strong disagreement. The first mass-produced repeater was the Volcanic Rifle which used a bullet with the base filled with powder and primer fed into the chamber from a spring-loaded tube called a magazine. It was named after a building or room used to store ammunition, the anemic power of the Rocket Ball ammunition used in the Volcanic doomed it to limited popularity. The Henry repeating rifle is a lever-action, breech-loading, tubular magazine fed rifle, designed by Benjamin Tyler Henry in 1860, it was one of the first firearms to use self-contained metallic cartridges. The Henry was introduced in the early 1860s and produced through 1866 in the United States by the New Haven Arms Company and it was adopted in small quantities by the Union in the Civil War and favored for its greater firepower than the standard issue carbine. Many later found their way West and was famed both for its use at the Battle of the Little Bighorn, and being the basis for the iconic Winchester rifle which are made to this day. The Henry and Winchester rifles would go on to see service with a number of militaries including Turkey, switzerland and Italy adopted similar designs. The first magazine-fed firearm to achieve success was the Spencer repeating rifle. The Spencer used a magazine located in the butt of the gun instead of under the barrel. The Spencer was successful, but the rimfire ammunition did occasionally ignite in the magazine tube and it could also injure the user. The new bolt-action rifles began to favor with militaries in the 1880s and were often equipped with tubular magazines. The Mauser Model 1871 was originally a single-shot action that added a magazine in its 1884 update
5.
Handloading
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Handloading or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components, rather than purchasing completely assembled, factory-loaded ammunition. Economy, increased accuracy, performance, commercial ammunition shortages, Reloading fired cartridge cases can save the shooter money, or provides the shooter with more, and higher quality, ammunition within a given budget. Besides economy, the ability to customize the performance of ammunition is a common goal, hunters may desire cartridges with specialized bullets or specific performance as regards bullet and velocity. Target shooters seek the best achievable accuracy, as well as the best shot-to-shot consistency, shotgunning enthusiasts can make specialty rounds not available in commercial inventories at any price. This technique also enables hunters to use the rifle and caliber to hunt a wider variety of game. Collectors of obsolete firearms who want to shoot those guns often must handload because appropriate cartridges or shotshells are no commercially produced. Handloaders can also create cartridges for which no equivalent exists - wildcat cartridges. As with any hobby, the enjoyment of the reloading process may be the most important benefit. Recurring shortages of ammunition are also reasons to reload cartridges. There are three aspects to ballistics, internal ballistics, external ballistics, and terminal ballistics, internal ballistics refers to things that happen inside the firearm during and after firing but before the bullet leaves the muzzle. Each cartridge reloaded can have each component carefully matched to the rest of the cartridges in the batch, brass cases can be matched by volume, weight, and concentricity, bullets by weight and design, powder charges by weight, type, case filling, and packing scheme. Where the most extreme accuracy is demanded, such as in rifle benchrest shooting, handloading is a prerequisite for success. The basic piece of equipment for handloading is the press, a press is a device that uses compound leverage to push the cases into the dies that perform the loading operations. Presses vary from simple, inexpensive single stage models, to complex progressive models that will eject a cartridge with each pull of a lever. Inexpensive tong tools have been used for reloading since the mid-19th century and they resembled a large pair of pliers and can be caliber specific or have interchangeable dies. Reloading presses are often categorized by the letter of the alphabet that they most resemble, O, C, the sturdiest presses, suitable for bullet swaging functions as well as for normal reloading die usage, are of the O type. Heavy steel completely encloses the single die on these presses, equally sturdy presses for all but bullet swaging use often resemble the letter C. Both steel and aluminum construction are seen with C presses, some users prefer C style presses over O presses, as there is more room to place bullets into cartridge mouths on C presses
6.
Cartridge (firearms)
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Military and commercial producers continue to pursue the goal of caseless ammunition. A cartridge without a bullet is called a blank, One that is completely inert is called a dummy. Some artillery ammunition uses the same concept as found in small arms. In other cases, the shell is separate from the propellant charge. In popular use, the bullet is often misused to refer to a complete cartridge. The cartridge case seals a firing chamber in all directions excepting the bore, a firing pin strikes the primer and ignites it. The primer compound deflagrates, it does not detonate, a jet of burning gas from the primer ignites the propellant. Gases from the burning powder pressurize and expand the case to seal it against the chamber wall and these propellant gases push on the bullet base. In response to pressure, the bullet will move in the path of least resistance which is down the bore of the barrel. After the bullet leaves the barrel, the pressure drops to atmospheric pressure. The case, which had been expanded by chamber pressure. This eases removal of the case from the chamber, brass is a commonly used case material because it is resistant to corrosion. A brass case head can be work-hardened to withstand the pressures of cartridges. The neck and body portion of a case is easily annealed to make the case ductile enough to allow reforming so that it can be reloaded many times. Steel is used in some plinking ammunition, as well as in military ammunition. Steel is less expensive than brass, but it is not feasible to reload, Military forces typically consider small arms cartridge cases to be disposable, one-time-use devices. However, case weight affects how much ammunition a soldier can carry, conversely, steel is more susceptible to contamination and damage so all such cases are varnished or otherwise sealed against the elements. One downside caused by the strength of steel in the neck of these cases is that propellant gas can blow back past the neck
7.
.45-70
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The. 45-70 rifle cartridge, also known as. 45-70 Government, was developed at the U. S. Armys Springfield Armory for use in the Springfield Model 1873, which is known to collectors as the trapdoor Springfield. The new cartridge was a replacement for the stop-gap. 50-70 Government cartridge which had adopted in 1866. The new cartridge was completely identified as the. 45-70-405, but was referred to as the.45 Government cartridge in commercial catalogs. The minimum acceptable accuracy of the, a skilled shooter, firing at known range, could consistently hit targets that were 6 ×6 feet at 600 yards —the armys standard target. It was a skill valuable mainly in mass or volley fire, after the Sandy Hook tests of 1879, a new variation of the. 45-70 cartridge was produced, the. 45-70-500, which fired a heavier,500 grain, bullet. The heavier bullet produced significantly superior ballistics, and could reach ranges of 3,350 yards, which were beyond the maximum range of the. 45-70-405. While the effective range of the. 45-70 on individual targets was limited to about 1,000 yards with either load and it was hoped the longer range of the. 45-70-500 would allow effective volley fire at ranges beyond those normally expected of infantry fire. While the nominal diameter was.450 inches, the groove diameter was actually closer to.458 inches. As was standard practice with many early U. S. commercially produced cartridges, specially-constructed bullets were often paper patched and this patch served to seal the bore and keep the soft lead bullet from coming in contact with the bore, preventing leading. Like the cloth or paper used in muzzleloading firearms, the paper patch fell off soon after the bullet left the bore. Paper-patched bullets were made of soft lead.450 inches in diameter, when wrapped in two layers of thin cotton paper, this produced a final size of.458 inches to match the bore. Paper patched bullets are available, and some black-powder shooters still roll their own paper patched bullets for hunting. Arsenal loadings for the. 45-70-405 and. 45-70-500 government cartridges generally used groove diameter grease groove bullets of.458 inches diameter. The predecessor to the. 45-70 was the. 50-70-450 cartridge, adopted in 1866 and used until 1873 in a variety of rifles, many of them percussion rifled muskets converted to trapdoor action breechloaders. The conversion consisted of milling out the rear of the barrel for the tilting breechblock, the. 50-70 was nevertheless adopted as a temporary solution until a significantly improved rifle and cartridge could be developed. The result of the quest for an accurate, flatter shooting.45 caliber cartridge. Like the. 50-70 before it, the. 45-70 used a copper center-fire case design, a reduced power loading was also adopted for use in the trapdoor carbine
8.
Semi-automatic rifle
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A semi-automatic rifle is a self-loading rifle that fires a single round each time the trigger is pulled. In contrast, an automatic rifle continuously fires rounds as long as the trigger is pressed. The ability to load the next round allowed for an increase in the rounds per minute the operator could fire. These rifles are known as self-loading rifles or auto-loading rifles and are often mistaken for automatic rifles or machine guns. Self-loading rifles were one of the most revolutionary designs in the history of warfare and they can be efficiently fed by en-bloc clip and internal magazine, detachable magazine or a combination of stripper clip and internal magazine. The first successful design for a rifle is attributed to German-born gunsmith Ferdinand Ritter von Mannlicher. 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 finally 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 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
9.
Bullet
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The word bullet is a firearm term. A bullet is a projectile expelled from the barrel of a firearm, the term is from Middle French and originated as the diminutive of the word boulle which means small ball. Bullets are made of a variety of materials and they are available singly as they would be used in muzzle loading and cap and ball firearms, as part of a paper cartridge, and much more commonly as a component of metallic cartridges. Bullets are made in a numbers of styles and constructions depending on how they will be used. Many bullets have specialized functions, such as hunting, target shooting, training, defense, a bullet is not a cartridge. In paper and metallic cartridges a bullet is one component of the cartridge, bullet sizes are expressed by their weight and diameter in both English and Metric measurement systems. For example.22 caliber 55 grain bullets or 5. 56mm 55 grain bullets are the same caliber, the word bullet is often used colloquially to refer to a cartridge, which is a combination of the bullet, paper or metallic case/shell, powder, and primer. This use of bullet, when cartridge is intended, leads to confusion when the components of a cartridge are discussed or intended, the bullets used in many cartridges are fired at a muzzle velocity faster than the speed of sound. Meaning they are supersonic and thus can travel a substantial distance, bullet speed through air depends on a number of factors such as barometric pressure, humidity, air temperature, and wind speed. Subsonic cartridges fire bullets slower than the speed of sound and so there is no sonic crack and this means that a subsonic cartridge such as.45 ACP can be effectively suppressed to be substantially quieter than a supersonic cartridge such as the.223 Remington. Bullets do not normally contain explosives, but damage the target by impact. The first use of gunpowder in Europe was recorded in 1247 and it had been used in China for hundreds of years. Later in 1364 hand cannon appeared, early projectiles were made of stone. Stone was used in cannon and hand cannon, in cannon it was eventually found that stone would not penetrate stone fortifications which gave rise to the use of heavier metals for the round projectiles. Hand cannon projectiles developed in a similar following the failure of stone from siege cannon. The first recorded instance of a ball from a hand cannon penetrating armor occurred in 1425. In this photograph of shot retrieved from the wreck of the Mary Rose which was sunk in 1545, the round shot are clearly of different sizes and some are stone while others are cast iron. The development of the hand culverin and matchlock arquebus brought about the use of cast lead balls as projectiles, bullet is derived from the French word boulette, which roughly means little ball
10.
.223 Remington
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The.223 Remington is a rifle cartridge. The name is pronounced either two-twenty-three or two-two-three Remington. It is commercially loaded with 0.224 inch diameter jacketed bullets, with weights ranging from 40 to 85 grains, a 90 gr Sierra Matchking bullet is available for reloaders. The.223 Rem was first offered to the sporting market in December 1963 in the Remington 760 rifle. In 1964 the.223 Rem cartridge was adopted for use in the Colt M16 rifle which became a standard rifle of the U. S. Army. The military version of the uses a 55 gr full metal jacket boattail design and was designated M193. In 1980 NATO modified the.223 Remington into a new design which is designated 5. 56×45mm NATO type SS109, the cartridge and rifle were developed as one unit by Fairchild Industries, Remington Arms, and several engineers working toward a goal developed by U. S. Early development work begins in 1957, a project to create a Small Caliber High Velocity firearm is created. Eugene Stoner of Armalite is invited to scale down the AR-10 design, Winchester is also invited to participate. It was then known as the.224 Springfield, concurrently with the SCHV project Springfield armory is developing a 7.62 mm rifle. Harvey is ordered to cease all work on the SCHV to avoid any competition of resources, eugene Stoner of Armalite had been advised to produce a scaled down version of the 7.62 mm AR-10 design. In May 1957 Stoner gives a live demonstration of the prototype of the AR-15 for General Wyman. As a result, CONARC orders rifles to test, Stoner and Sierra Bullets Frank Snow begin work on the.222 Remington cartridge. Using a ballistic calculator they determine that a 55 grain bullet would have to be fired at 3, robert Hutton starts development of a powder load to reach the 3,300 fps goal. He uses DuPont IMR4198, IMR3031 and an Olin Powder to work up loads, testing is done with a Remington 722 rifle with a 22 Apex Barrel. During a public demonstration the round penetrates the US steel helmet as required. But testing shows chamber pressures to be excessively high, Stoner contacts both Winchester and Remington about increasing the case capacity. Remington creates a larger cartridge which is called the.222 Special which is loaded with DuPont IMR4475 powder,1958, During parallel testing of the T44E4 and the AR-15 the T44E4 experiences 16 failures per 1,000 rounds fired compared to 6.1 for the AR-15
11.
Bushmaster M17S
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The Bushmaster M17S is a semi-automatic bullpup rifle that was manufactured by Bushmaster Firearms International from 1992 until 2005. The design of the M17S dates back to 1986 when the Australian company Armtech Ltd. developed the prototype as a military rifle for the Australian Army. Two prototypes were developed, one for the 5. 56×45mm NATO, the C60R, the C30R was developed hastily and an out-of-battery ignition resulted in a prototype exploding during a high-profile demonstration. The Australian Army adopted a version of the Steyr AUG, leading to the sale of the Armtech design to another Australian company. Edenpine, with Charles St. George, improved the design resulting in the ART-30 and SAK-30, the salient features of the M17S were in place but some Finnish Valmet parts were used instead of AR-15 parts to save money. Edenpine expressed interest in selling the design on the United States market, the rifle was sold from October 1992 to 1994 as the Edenpine M17S Bull-Pup rifle. The distributor was Edenpine Inc. the American branch of Edenpine of Australia, headquartered in San Jose, the M17S was the only American-made bullpup rifle to be offered commercially, and the only one not banned by name. The BATF approved a version with a barrel sleeve which covered more of the muzzle thread. This made it impossible to attach the M16-style Birdcage flash hider without modification of the barrel sleeve. The Bushmaster M17S is a rifle that uses a gas-operated. The design takes the system of the Armalite AR-18 and moves the pistol grip forward in a manner similar to the British SA80. Instead of the sheet metal receiver of the AR18 and SA80 and this method of construction is particularly efficient and was subsequently copied by other designs. Operation is a fixed piston system that is self-compensating. The rifle is chambered in 5. 56×45mm NATO and accepts STANAG magazines, the main drawback of the subsequent modified design, reported by some users, was the tendency of its aluminum hand guard to become hot after one or two magazines were emptied in rapid fire. Bushmaster discontinued production of the M17S in 2005, a more up to date version is offered by K&M Arms and chambered in at least four calibers. List of bullpup firearms Modifications and spare parts Kmaerospace. com Modern Firearms article Operators manual Article at CheaperThanDirt. com K&M Arms homepage
