The M1947 Johnson auto carbine was intended as a replacement for a .30 caliber semi-automatic rifle that was standard US service rifle during World War II, the Korean War, and a limited amount when?
M1947 Johnson auto carbine The M1947 Johnson auto carbine is a semi-automatic derivative of the M1941 Johnson machine gun. It was intended as a replacement of the M1 rifle but not accepted. The auto carbine never got past the prototype stage, only five of them ever being made.
Special Purpose Individual Weapon The Special Purpose Individual Weapon (SPIW) was a long-running United States Army program to develop, in part, a workable flechette-firing "rifle", though other concepts were also involved. The concepts continued to be tested under the Future Rifle Program and again in the 1980s under the Advanced Combat Rifle program, but neither program resulted in a system useful enough to warrant replacing the M16.