And how many magazines do the give you when you walk out the door?Do you ever run out of rounds in combat?US Army personnel used the M14 service rifle up through at least 1969 in Basic Training (Boot Camp)However, during AIT (Advanced Individual Training) which immediately followed Basic Training, men scheduled for Vietnam were trained with the new Jungle Rifle.designated the M16Men sceduled for Europe (Germany) retained the M14 service rifleThe M14 served as an infantrymen\'s rifle in Vietnam with US troops, from about 1965 until approximately 1967; by which time the M16 was nearly fully transitioned into the unitsUS Army (US Marines may have been different) riflemen utilized two canvas magazine pouches on their pistol beltsOne on each side, each able to contain two all steel M14 magazine with a 20 round capacity5 magazines were normally carried by riflemen; four on the pistol belt within the two above described pouches, and one in the rifleNearly always.the M14 rifle was issued with a bayonet; it was considered part of the rifle (except at the rifle range)The M14\'s magazine was made of steel and only held 20 cartridgesCarrying more than those above described 5 magazines would have been a heavy loadThe M16 used ALUMINUM magazines; seven of those could be carried in a bandolier with ease Yes you can run out in a firefight or if your supply chain is cut offMy father served in Korea and when the chinese attacked, they just kept attacking until the UN forces ran out of ammo.Other related question