Eldon H.Erlenback of the 1st Air Calvary, 5th Battalion, 7th Calvary Regiment with his M-16A-1 and PRC-25 (“prick”) Radio, 1970, near Cambodia. The “prick” was developed in the 1950’s. Normal range was of 5 kilometers with the short antenna, up to 8 kilometers long antenna and was powered by a battery that could last about 20 hours.