The M 14 was well liked, it was more accurate at long distances, the Coast Guard and some Special Ops still use the M14. The M 14 was difficult to handle on full auto. Curtis LaMay wanted the M16 for air base defense, less recoil, more rounds could be carried, on full auto is was lot of fire power as the Air Force, (Air Police later Security Police) had fewer machine guns per unit than the Army and the M16 made up for lack of firepower. The Army and Marine Corps are moving towards a new assault rifle, not the same platform, the Air Force is still using the M16, the new version with bust mode. From I read is not planning on adapting the new Army rifle. Air Froce Para Rescue and other speical ops use the M4, the carbin version of the M16. I have only fired the M14 on one occassion, I thought it was quite nice, but given a choice I would take the M16.