<human>:  Who designed the Armalite AR-15?
<bot>: The AR-15 was designed by Eugene Stoner, who also designed the M1 Garand. The AR-15 is a lightweight, semi-automatic rifle, with a rotating bolt, and a detachable magazine. It was originally designed to be a lightweight, accurate, and affordable rifle for the United States military. It was later adopted by civilians and police forces around the world.