The AR-15 / M-16 and its many variations are manufactured by a lot of companies that have captured the attention and affection of Police and civilian shooters around the world due to their accuracy, ergonomics and modularity. Seems everyone is using the AR platform in one form or another. This rifle has a large following and many companies produce aftermarket parts and devices in abundance for this rifle platform.
The AR-15 series of rifles are lightweight, air-cooled, magazine-fed ergonomic and very easy to learn and maintain the operating system. The AR-15 upper and lower are produced and forged from aircraft grade 7075-T6 aluminum that is highly corrosive-resistant and easy to machine. It is very accurate and the straight-line stock reduces recoil and muzzle climb over traditional bent stock designs. The use of synthetic materials in the pistol grip and forearm eliminate splintering or swelling in adverse weather conditions.
The AR-15 has adjustable ghost ring sights, most have the front sight adjustable for elevation and the rear sight adjusts windage. Some models have a variation of sight configuration based on different models.
The AR-15 is a great choice of a lightweight carbine or rifle for the civilian or LE officer alike. Ammunition is readily available in the US in .223 and 5.56 mm calibers. There are many different configurations available and aftermarket parts can be added to make the rifle fit any situation that could be needed. On the Law Enforcement side, many Departments are adopting the AR-15 as a duty rifle in increase the firepower of the individual officer. Many officers carry only a handgun and/or shotgun. A rifle caliber weapon system can increase the ability of the police officer to protect him and others by controlling a larger area. As times change, the police and civilians will face terrorists and could run into heavily armed criminal groups that engage in nasty activities that require firepower to suppress.