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Sig Sauer AR-15 Rifle by Evan Patey

Sig Sauer AR-15 Rifle by
Article Posted: 07/01/2013
Article Views: 393
Articles Written: 9
Word Count: 1183
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Sig Sauer AR-15 Rifle

Recreation & Leisure,Sports,Camping
Brief History

The AR-15 Rifle was designed as the military M-16 from the 1960’s to be used in U.S. military trials as a replacement for the legacy the M-14. The company that designed the AR-15 was called Fairchild Aircraft and Engine Corporation. The division, that was engineered was called Aramalite and headed by chief engineer Eugene Stoner. It was basically designed around a .222 Remington cartridge, which was later upgraded into a .223 Remington cartridge on the request of the US military. The AR-15 have also been manufactured to propel a 55-grain bullet at approximately 3,000 feet per second. The objective was that for the very same weight, a solder could carry more ammunition in the AR-15 in comparison to the older M-14 rifle.

The US Airforce was the first one to adopt the AR-15, after lengthy evaluation and revisions. The army did not choose the rifle, at that time, for various political reasons. This changed since the US became more involved with the Viet Name war. At some point, Secretary of Defense James McNamara was able to cut through some political red tape, and the AR-15 was selected for standard issue to troops deployed to Viet Nam. The army gave it a military designation of a M16, which now is used to distinguish the military version, as opposed to the civilian version, or the AR-15.

After lengthy evaluation and revisions, the AR-15 rifle was just adopted by the U.S. Air Force to be used by its base security personnel. For various political reasons, the Army failed to pick the rifle. However, as America became active in the Vietnam War, Secretary of Defense James McNamara cut from the Army Ordnance Department’s red tape and selected the AR-15 for issuance to troops. The Army gave it the military designation of "M-16".

During its initial use throughout the war, the rifle earned a reputation for jamming and other stoppages. This was caused by several reasons:

Soldiers hadn't been trained on proper weapons maintenance. Cleaning kits were generally not available in the field. Poorly quality Remington .223 ammunition, which caused fouling. In time, the army recognized the flaws and troops were provided higher quality ammunition, cleaning kits and training on proper maintenance. Equipment Characteristics, Capabilities, and Features

The SIG Sauer AR-15 may be consider the best AR-15 which is commercially available as a result of it's premium quality European engineering. The most popular model is the SIG M400, that's an enhanced AR-15 rifle. It is lightweight, air cooled and gas operated and perfect for both offensive and defensive situations. It is a magazine-fed rifle that is commercially available with a semi-automatic fire. This can be modified to automatic using after market kits and improve your capability to engage targets while in the field role. The receivers are made of light-weight aluminum alloys; however, the security, durability, and performance of the rifles are in no way reduced. The portability and logistical values are greatly increased, in particular when air transport is used.

SIG M400 rifle or enhanced SIG Sauer AR-15

The SIG M400 is a direct impingment rifle featuring a rotary bolt mechanism, which is commercially available in a semi-automatic version, and upgrade-able to a full automatic firing operation. To be clear - semi-automatic implies that one round is fired, every time the trigger is pulled, until the magazine is emptied of ammunition. The bolt locking action is one of the mechanical top features of the weapon. The bolt and barrel extension contains locking lugs which engage and lock the bolt firmly inside the barrel extension. The initial force of the explosion of the cartridge propellant is absorbed by the barrel, barrel extension, and bolt. The trigger guard is readily adaptable to winter operations. A spring-loaded retaining pin is depressed to allow ready access to the trigger when wearing arctic mittens. The ejection port cover prevents dirt or sand from getting into the ejection port, The cover must be closed at times when firing is not anticipated. It opens automatically by the forward or rearward movement of the bolt carrier.

Location and High-Level Description Of Major Components

A) AR upper assembly - The charging handle is the thing that loads the weapon. B) Bolt carrier assembly - This sends to bolt to the chamber and fires the weapon. It includes the firing pin, extractor, bolt, ejector, and cam pin. C) Upper Receiver. The rifle barrel assembly is air-cooled, contains flash suppressor and front sight assembly, and supports the two hand guards and the sling swivel. Upper receiver contains rear sight, ejection port and cover, and a housing for your bolt carrier and bolt assembly. The upper assembly also includes the hand guard which protects the barrel as well as the gas system from damage. This also protects your hands from heat. D) AR lower assembly - The lower receiver has the trigger assembly, sear hammer assembly, selector lever, rifle grip, bolt catch, and butt-stock assembly. The AR butt-stock assembly houses the action spring, buffer assembly, and extension assembly. E) AR magazine. 30 round cartridge capacity. (F) Arm sling. The small arms sling can be adjusted and provides a means to carry the weapon

Upper Assembly and Barrel

The barrel is mechanically connected to the receiver using the barrel nut and extension. The flash suppressor, if needed, may be screwed onto the muzzle end. The front sight housing, that is attached to the barrel, has the gas port and front sight. The upper receiver enables you to attached an M1913 accessory rail so that you can attach a wide variety of different gadgets such as sights or optics. Bolt Carrier Assembly

The bolt carrier assembly controls locking and unlocking via the camp pin. The bolt carrier features a carrier key that transfers gas from your gas tube to your belt carrier assembly. The bolt carrier cocks the hammer. Lower Assembly and Stock

The lower receiver assembly is made up of the magazine well and release, the sling attachment point, the bolt catch lever, the fire control mechanism (or trigger) as well as the butt stock. The telescoping butt stock can be adjusted and differs from model to model. It could be adjusted to allow for the size of the operator, or for storage. Adjustment is as simple as pressing the release latch, and then pushing or pulling the stock to the desired position. You can even take off the butt stock, by depressing the lever and sliding the stock to the full extension. Once at end, pull the release latch and slide along the stock from the receiver. You can re-install the stock by gently sliding it back on the receiver extension.

Trigger Operation

The SIG Sauer AR-15 comes with a trigger guard for safety. It can be released temporarily if shooting with gloves, but should always be in position for safety purposes. You can lower the guard by depressing the spring loaded retainer as shown below. Be absolutely careful when operating these features. As an example, inserting a gloved finger, could discharge the weapon!

For the best guide to SIG Sauer AR-15, visit:

Related Articles - ar-15, sig sauer ar 15, ar upper, ar lower, sig ar 15, ar 15, sig m400,

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