Who created the M16A1?

The M16A1 rifle was developed by the United States military as an improved version of the original M16. The design was primarily attributed to Eugene Stoner, who initially created the Armalite AR-15 rifle, which served as the basis for the M16 platform. The M16A1 was adopted by the U.S. military in 1967 and featured enhancements such as a forward-assist mechanism and a chrome-lined barrel to improve reliability.