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Colt IAR6940
The Colt Infantry Automatic Rifle 6940 (commonly shortened to Colt IAR or IAR6940) is a light machine gun designed by Phil Hinckley and manufactured by American firearms manufacturer Colt's Manufacturing Company, Colt. History Background On March 27, 2008, the United States Marine Corps issued a Purchase Description outlining the requirements for the Infantry Automatic Rifle (IAR) to potential manufacturers. The Marines were specifically looking for designs that met precise criteria. The primary objective of the IAR Program was to replace the M249 Squad Automatic Weapon (SAW) with a single-infantry marine-operated automatic rifle that prioritized lightweight and ease of portability to enhance dismounted maneuverability. The IAR would be a non-developmental, 5.56mm automatic rifle that would be more durable and reliable than the M249 SAW. The Marine Corps put across a specified kit that would accompany the IAR, which were a rear aperture sight (Matech BUIS), a Blank-firing ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Machine Gun
A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridge (firearms), cartridges of the same caliber as the other riflemen of the same combat unit are often referred to as squad automatic weapons. Characteristics While early light machine guns fired full-powered rifle cartridges, modern light machine guns often fire smaller-caliber rifle cartridges than medium machine guns – generally the same intermediate cartridge fired by a service's standard assault rifle – and are usually lighter and more compact. Some LMGs, such as the Russian RPK, are modifications of existing designs and designed to share the same ammunition. Adaptations to the original rifle generally include a larger magazine, a heavier barrel to resist overheating, a more robust mechanism to support sustained fire and a bipod. A light machine gun is also defined by its usage as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AR-15–style Rifle
An AR-15–style rifle is a lightweight semi-automatic rifle based on or similar to the Colt AR-15 design. The Colt model removed the selective fire feature of its predecessor, the original ArmaLite AR-15, which is a scaled-down derivative of the AR-10 design (by Eugene Stoner). It is closely related to the military M16 rifle. ArmaLite sold the patent and trademarks for both to Colt's Manufacturing Company in 1959 after the military rejected the design in favor of the M14. After most of the patents for the Colt AR-15 expired in 1977, many firearm manufacturers began to produce copies of the rifle under various names. While the patents are expired, Colt has retained the trademark to the ''AR-15'' name and is the sole manufacturer able to label their firearms as such. From 1994 to 2004, the Federal Assault Weapons Ban restricted the sale of the Colt AR-15 and some derivatives in the United States, although it did not affect rifles with fewer listed features. After the phrase "mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word ''laser'' originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow and the optical amplifier patented by Gordon Gould. A laser differs from other sources of light in that it emits light that is coherence (physics), ''coherent''. Spatial coherence allows a laser to be focused to a tight spot, enabling uses such as optical communication, laser cutting, and Photolithography#Light sources, lithography. It also allows a laser beam to stay narrow over great distances (collimated light, collimation), used in laser pointers, lidar, and free-space optical communication. Lasers can also have high temporal coherence, which permits them to emit light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Dot Sight
A red dot sight is a common classification for a non- magnifying reflector (or reflex) sight that provides an illuminated red dot to the user as a point of aim. A standard design uses a red light-emitting diode (LED) at the focus of collimating optics, which generates a dot-style illuminated reticle that stays in alignment with the firearm the sight is attached to, regardless of eye position (nearly parallax free). Red dot sights are considered to be fast-acquisition and easy-to-use gun sights for firearms used in civilian target shooting, hunting, or in police and military applications. They are also used on cameras and telescopes. On cameras they are used to photograph flying aircraft, birds in flight, and other distant, rapidly moving subjects. Telescopes have a narrow field of view and therefore are often equipped with a secondary "finder scope" such as a red dot sight to orient them. Description The typical configuration for a red dot sight is a tilted spherical mir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forward Assist
Forward assisting is the practice of moving the bolt or bolt carrier of a firearm fully forward ''in battery'' when the return spring has not done so (or there is a chance that it will not have done so) to prevent out-of-battery firing. It is only used on closed bolt only firearms. Some firearms have a dedicated device to allow forward assisting; on others, it is simply a procedure performed on reciprocating (i.e. attached to the bolt/bolt carrier) charging handles. As a device The forward assist is a button found on firearms with non-reciprocating (i.e. not attached to the bolt/bolt carrier) cocking handles, commonly on AR-15 rifle derivatives, such as the M16 rifle, and is usually located on the receiver near the bolt closure. It is a ratchet-like device that interfaces with the multiple serrations found on the side of the bolt carrier. The original AR15 and M16 designs lacked the "bolt forward assist" feature found on the later M16A1. When hit, it pushes the bolt carrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Full-automatic
An automatic rifle is a type of Self-loading rifle, autoloading rifle that is capable of fully automatic firearm, automatic fire. Automatic rifles are generally selective fire, select-fire weapons capable of firing in Semi-automatic firearm, semi-automatic and automatic firing modes (some automatic rifles are capable of Burst mode (weapons), burst-fire as well). Automatic rifles are distinguished from semi-automatic rifles in their ability to fire more than one shot in succession once the trigger is pulled. Most automatic rifles are further subcategorized as battle rifles or assault rifles. History Maxim In June 1883 Hiram Maxim filed his first patent to do with automatic firearms covering semi-automatic and fully automatic Winchester rifle, Winchester and Martini-Henry rifles as well as an original automatic rifle and blowback- and recoil-operated machine guns, both single and multi-barrelled. Mannlicher In 1885 Ferdinand Mannlicher made an experimental self-loader based on wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-automatic Rifle
A semi-automatic rifle is a type of rifle that fires a single round each time the Trigger (firearms), trigger is pulled while automatically loading the next Cartridge (firearms), cartridge. These rifles were developed Pre-World War II, and were used throughout World War II. Rifles are firearms designed to be fired while held with both hands and braced against the shooter's shoulder for stability. Externally similar shotguns can fire multiple Shot (pellet), pellets simultaneously through a smoothbore, while rifle Gun barrel, barrels are Rifling, rifled to spin-stabilize individual bullets. The actions of semi-automatic rifles use a portion of the fired cartridge's energy to eject the spent casing and load a new round into the Chamber (firearms), chamber, readying the rifle to be fired again. This design differs from manually operated rifles such as Bolt action, bolt-action and Lever action, lever-action rifles, which need to chamber a cartridge manually before firing again, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selective Fire
Selective may refer to: * Selective school, a school that admits students on the basis of some sort of selection criteria ** Selective school (New South Wales) See also * Selective breeding Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant m ..., the process of breeding for specific traits * Selection (other) * Selectivity (other) * * {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt (firearms)
Bolt from a Karabiner 98k bolt-action rifle. Note the curved handle on the side for manual operation thumb"> Slide locked back on a Desert Eagle pistol, showing the gas-operated rotating bolt mechanism A bolt is the part of a repeating, breechloading firearm that blocks the rear opening (breech) of the barrel chamber while the propellant burns, and moves back and forward to facilitate loading/unloading of cartridges from the magazine. The firing pin and extractor are often integral parts of the bolt. The terms " breechblock" and "bolt" are often used interchangeably or without a clear distinction, though usually, a bolt is a type of breechblock that has a nominally circular cross-section. In most automatic firearms that use delayed blowback, recoil, or gas operation, the bolt itself is housed within the larger bolt carrier group (BCG), which contains additional parts that receives rearward push from a gas tube ( direct impingement) or a gas piston (short-stroke o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CAR-15
The Colt Automatic Rifle-15 or CAR-15 is a family of M16 rifle–based firearms marketed by Colt in the 1960s and early 1970s. However, the term "CAR-15" is most commonly associated with the Colt Commando (AKA: XM177); these select-fire carbines have ultrashort and barrels with over-sized flash suppressors. Etymology The CAR-15 name was an attempt to re-associate the AR-15 name with Colt, since the AR initially stood for "Armalite Rifle" the original manufacturer of the Armalite AR-15. Colt later abandoned the CAR-15 concept, but continued to make carbine variations, using the " M16" brand for select-fire models and the " Colt AR-15" brand for semi-automatic models. However, in present usage, "CAR-15" is the generic name for all carbine-length variants made before the M4 carbine. History After Colt's Patent Firearms Manufacturing Company purchase of the rights and intellectual property to the AR-10 and AR-15 rifles from Armalite in late 1959, Colt's embarked on a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Impingement
Direct impingement is a type of gas operation for a firearm that utilizes gas from a fired cartridge to impart force on the bolt carrier or slide assembly to cycle the action. Firearms using direct impingement are theoretically lighter, more accurate, and less expensive than firearms using cleaner and cooler gas piston systems. Advantages Firearms with a direct impingement design can, in principle, be constructed lighter than piston-operated designs. Because high-pressure gas acts directly upon the bolt and carrier in a direct impingement system, it does not need a separate gas cylinder, piston, and operating rod assembly of a conventional piston-operated system, only requiring a gas tube to channel gas from the barrel back towards the action. This saves weight, lowers manufacturing costs, and reduces the mass of the operating parts, and thereby the wear on mechanical parts due to movement. By removing the gas piston, the potential amount of moving mass is also lowered, decreas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Cooling
Air cooling is a method of dissipating heat. It works by expanding the surface area or increasing the flow of air over the object to be cooled, or both. An example of the former is to add cooling fins to the surface of the object, either by making them integral or by attaching them tightly to the object's surface (to ensure efficient heat transfer). In the case of the latter, it is done by using a fan blowing air into or onto the object one wants to cool. The addition of fins to a heat sink increases its total surface area, resulting in greater cooling effectiveness. There are two types of cooling pads that can be used for air cooling: one is the honeycomb design and another one is excelsior. In all cases, the air has to be cooler than the object or surface from which it is expected to remove heat. This is due to the second law of thermodynamics, which states that heat will only move spontaneously from a hot reservoir (the heat sink) to a cold reservoir (the air). Derating at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
