The AR

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The AR-15 is based on the 7.62 mm AR-10

1st Designed by Eugene Stoner 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, and there are shotguns and pistols whose model numbers also include the "AR" prefix.

ArmaLite sold its rights to the AR-10 and AR-15 to Colt in 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. However, 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, though later heavy-barrel versions of the civilian AR-15 can weigh upwards of 8.5 lbs.

Left: AR-10 Tactical w/Leupold MK4 Scope
Left Middle: AR-10 Tactical (No Sights Yet)
Right Middle: AR-15 w/Aimpoint Optic's on a larue mount
Right: AR-15 w/Leupold CQ MK4 Scope

Below: LMT Ar-15 Suppressed w/Aimpoint Micro On a Larue mount

Today the AR-15 and its variations are manufactured by many companies and have captured the affection of sport shooters and police forces around the world due to their accuracy and modularity.

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 manufacturers make AR-15 clones marketed under separate designations, although colloquially these are sometimes also referred to by the term AR-15.
Born In The USA

AR-15

Some notable features of the AR-15 include:

Aircraft grade aluminium receiver

Modular design allows for a variety of accessories and makes repair easier

Small caliber, accurate, high velocity round

Synthetic stock and grips do not warp or splinter

Front sight adjustable for elevation

Rear sight adjustable for windage and elevation

Wide array of optical devices available in addition to or as replacements of iron sights. A direct impingement gas system, synthetic pistol grip (regulated in some jurisdictions)
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