This video is one of many in a series created from an interview conducted by Edward C. Ezell with Eugene Stoner in 1988 at ARES Inc. in Port Clinton, Ohio. All the footage is courtesy of the Smithsonian Institution Archives. All I have done is cut some of the waiting time between tapes out and tried to fix the audio. Otherwise, what you are seeing is entirely unadulterated.
About half way through Stoner explains what went wrong with M-16 in early years of Vietnam War.