Re: Bushmaster .223
posted at 12/19/2012 12:39 PM EST
In response to tvoter's comment:
Actually it's purpose is defense against multiple targets in an urban or mid range environment.
Right. Because what the army does when it carries out a combat mission is to go to an area to defend itself....
Why does tvoter think he can get any traction by lying about facts we already know the truth about?
The AR-15 is a lightweight, 5.56 mm, magazine-fed, semi-automatic rifle, with a rotating-lock bolt, actuated by direct impingement gas operation or long/short stroke piston operation. It is manufactured with the extensive use of aluminum alloys and synthetic materials.
The AR-15 was first built by ArmaLite as a selective fire rifle for the United States armed forces. Because of financial problems, ArmaLite sold the AR-15 design to Colt. The select-fire AR-15 entered the US military system as the M16 rifle. Colt then marketed the Colt AR-15 as a semi-automatic version of the M16 rifle for civilian sales in 1963. Although the name "AR-15" remains a Colt registered trademark, variants of the firearm are independently made, modified and sold under various names by multiple manufacturers.
The AR-15 is based on the 7.62 mm AR-10, designed by Eugene Stoner, Robert Fremont, and L. James Sullivan of the Fairchild ArmaLite corporation. The AR-15 was developed as a lighter, 5.56 mm version of the AR-10. The "AR" in AR-15 comes from the ArmaLite name. ArmaLite's AR-1, AR-5, and some subsequent models were bolt action rifles, the AR-7 a semiautomatic survival rifle and there are shotguns and pistols whose model numbers include the "AR" prefix.
ArmaLite sold its rights to the AR-10 and AR-15 to Colt in 1959. After a tour by Colt of the Far East, the first sale of AR-15s was made to Malaysia on September 30, 1959, with Colt's manufacture of their first 300 AR-15s in December 1959. Colt marketed the AR-15 rifle to various military services around the world, including the U.S. Navy, Air Force, Army, and Marine Corps. The AR-15 was eventually adopted by the United States military under the designation M16. Colt continued to use the AR-15 trademark for its semi-automatic variants (AR-15, AR-15A2) which were marketed to civilian and law-enforcement customers. The original AR-15 was a very 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 lbs.
Today the AR-15 and its variations are manufactured by many companies and are popular among civilian shooters and law enforcement forces around the world due to their accuracy and modularity (for more history on the development and evolution of the AR-15 and derivatives see M16 rifle).
The trademark "AR15" or "AR-15" is registered to Colt Industries, which maintains that the term should only be used to refer to their products. Other AR-15 manufacturers make AR-15 clones marketed under separate designations, although colloquially these are sometimes referred to by the term AR-15.
Some notable features of the AR-15 include:
- Aircraft grade forged 7075-T6 aluminum receiver is lightweight, highly corrosion-resistant, and easy to machine
- Modular design allows the use of numerous accessories such as after market sights, vertical forward grips, lighting systems, night vision devices, laser targeting devices, muzzle brakes/flash hiders, sound suppressors, bipods, etc., and makes repair easier
- Straight-line stock design eliminates the fulcrum created by traditional bent stocks, reducing muzzle climb.
- Small caliber, accurate, light weight, high velocity round (.223/5.56x45mm)
- Easily adapted to fire numerous other rounds
- Front sight adjustable for elevation
- Rear sight adjustable for windage (most models) and elevation (some models)
- Wide array of optical aiming devices available in addition to or as replacements of iron sights
- direct impingement gas system (as designed) with short or long stroke gas piston, or direct blowback operating systems available
- Synthetic pistol grip and butt stock that do not swell or splinter in adverse conditions (regulated in some states)
- 30-round capacity magazine available where legal
- Ergonomic design that makes the charging handle, selector switch (safety), magazine release, and bolt catch assembly easy to access.
- 4 MOA Accuracy as a MILSPEC standard
Semi-automatic AR-15s for sale to civilians are internally different from the full automatic M-16, although nearly identical in external appearance. The hammer and trigger mechanisms are of a different design. The bolt carrier and internal lower receiver of semi-automatic versions are milled differently, so that the firing mechanisms are not interchangeable. This was done to satisfy United States Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) requirements that civilian weapons may not be easily convertible to full-automatic. Despite this, through use of a "Drop In Auto Sear" or "lightning-link," conversion to full automatic is very straightforward (sometimes requiring slight modification to the bolt carrier). Such modifications, unless using registered and transferable parts made prior to May 19, 1986, are illegal. (The Firearm Owners Protection Act in 1986 has redefined a machinegun to include individual components where a semiautomatic firearm can be converted to full-automatic based on a 1981 ATF ruling on machinegun parts.)
Automatic variants have a three-position rotating selective fire switch, allowing the operator to select between three modes: safe, semi-automatic, and either automatic or three round burst, depending on model. Civilian AR-15 models do not have three-round burst or automatic settings on the fire selector. In semi-automatic only variants, the selector only rotates between safe and semi-automatic. Due to this, weapons modified to full automatic using a lightning-link are capable of full automatic fire only—unless a special full automatic fire select mechanism and modified selector-switch is substituted.
No further boring tvoter lies will be heeded.
Let him go pull his sister's hair if he's so bored he needs the attention.