AR-15 is legendary American rifle based on earlier AR-10 and designed by Eugene Stoner, Jim Sullivan and Bob Fremont in 1957. It’s a light-weight rifle with 5,56mm/.223 caliber bullets. It’s air-cooled and comes with rotating lock-bolt. Some versions are actuated with gas while others use piston operations, depending on the manufacturer (Colt, Sig Sauer, Adams Arms, Sturm Ruger etc, if you want to see the full list of AR-15 manufacturers click here).
AR-15 was designed by ArmLite, but later its design rights were bought by Colt and in 1959 it became the M16, official service rifle of Army, Navy , Air Force and Marine Corps. Colt continued to sell semi-automatic AR-15 to civilians and law-enforcement agencies. For the full history of this rifle click here.
AR-15s semi-automatic rifle looks almost the same as M16, but it comes with significant changes in bolt carrier, internal receiver and firing mechanism to prevent conversion to full-automatic. AR-15 comes in many configurations that sometimes include some extra features like sniper sights. It also comes in different sizes, from shorter models of carbine size to full-size heavy barrel models. Its design also allows users to change its upper receiver, which leads to vast variety of barrels with different sizes and calibers that can be used, like: 6,8 Remington, .223 Remington 5,56x45mm, 6,5 mm Grendel etc. Visit the official website for more information or simply click here.
Majority of AR-15 rifles available in United States come with 12-28″ threads barrel and use muzzle devices such as flash suppressor, sound suppressor etc. In some areas where the usage of flash suppressors is banned, buyers use compensators or muzzle brakes.
Ownership of AR-15 rifles is legal in United States. Some states like: New York, New Jersey, Massachusetts, California and Connecticut regulate ownership and possession of AR-15 rifles by restricting some additional features or rifles made by certain manufacturers. There are also restrictions on lower receivers for AR-15 rifles, which are considered a firearm, by US law regulations.
For more information on AR-15 click here or visit this website.