AR-15 platform

The AR-15 platform refers to a type of semi-automatic rifle originally developed by Armalite in the 1950s. It is modular, meaning individual parts like barrels, stocks, and sights can be customized or replaced easily. Known for its versatility, it is used for sport shooting, hunting, and self-defense. The "AR" stands for "Armalite Rifle," not "assault rifle." The platform operates by firing one round with each trigger pull, cycling the next round automatically. Its widespread use and adaptability have made it one of the most popular rifle designs in the United States.