The AR 15 is a very versatile rifle and for that reason it is very popular. Being versatile, an AR 15 can be used for the military, hunters and even just gun enthusiasts. This of course makes the AR 15 rifle very popular and as many people that own rifles also own scopes for that rifle, ar 15 scopes are among the most popular scopes. Although many rifle owners use scopes, they may use them for different reasons and so there are different types of scope available for use with the AR 15. For instance, a military person may need a scope that whilst being effective, is also light weight and rugged enough to be carried into combat situations. On the other hand, a gun enthusiast that only uses their rifle for target shooting; may only be interested in buying the most accurate scope with no concerns as to how big it is or how heavy it may be. A hunter may be interested in both accuracy and portability and so they may opt for a scope with accuracy and weight somewhere between those scopes chosen by military personnel and target shooters. Regardless of which scope they choose to buy, they will have to ensure before they buy it that it fits and has the correct connection for their AR 15, although some people do opt to buy the scope they want and then adapt it to fit their rifle but that could have a cost in the accuracy the scope provides.
Some of the more popular scopes that are bought for use with an AR 15 are made by Nikon, Aimpoint or Vortex but there are many others on the market. As most rifle scopes are specifically designed for one particular type of use, there is no one scope which is the best for everybody, it will depend on the use they intend to use it for. The Trijicon scope was used by the US military in both Iraq and Afghanistan and was proven to be suitable for use in those theatres. The British and Israeli militaries also use these types of scope. The Leopold Company has been in operation for generations and their scopes have also been found suitable in combat situations and so are used by many militaries around the world. Millet is a company that makes scopes for use by hunters and law enforcement agencies and continues making them to this day although in 2005, they were bought out by the Bushnell Company. Although Nikon produce many optics including high end binoculars and scopes, many of their scopes are very affordable. Although the NCStar Company was only founded in 1997 and does not make scopes to the same quality as some of these other companies, their scopes are affordable and can allow users to put holes in targets. Although BSA was once renowned for building a variety of military equipment, it no longer does but still produces scopes which are affordable and of high quality.