https://youtu.be/jBl6ERBZ4sw The AR-16 was developed in the late 1950s as a less manufacturing intensive option to the AR-10. It began with the AR-12, which was a prototype intended to use a stamped receiver with the Stoner DI gas system. When Armalite sold the AR-15 patents to Colt, they had to revise that design, and it