วันพุธที่ 28 มกราคม พ.ศ. 2552

เอ็ม 60


The M60 is an air-cooled and gas-operated machine gun firing from an open bolt. It chambers the 7.62x51mm NATO cartridge and feeds from a disintegrating belt of metallic M13 links. In most variants, it has an integrated folding bipod and can be mounted on the M122 Tripod and some fixed mounts.
In the U.S. military, the M60 has largely been replaced by versions of the M240 in the medium machine gun and fixed weapon roles, and by the M249 as a squad automatic weapon. It remains in use in every branch of the U.S. military (as well as other armed forces) and continues to be manufactured.
The M60 is considered effective up to 1,100 meters when firing at an area target and mounted on a tripod; up to 800 meters when firing at an area target using the integral bipod; up to 600 meters when firing at a point target; and up to 200 meters when firing at a moving point target. United States Marine Corps doctrine holds that the M60 and other weapons in its class are capable of suppressive fire on area targets out to 1,500 meters if the gunner is sufficiently skilled.
The M60 is generally used as crew-served weapon and operated by a team of two or three men. The team consists of the gunner, the assistant gunner (A-gunner in military slang), and the ammunition bearer. The gun's weight and the amount of ammunition it consumes when fired make it difficult for a single soldier to carry and operate. The gunner carries the weapon and, depending on his strength and stamina, anywhere from 200 to 1000 rounds of ammunition. The assistant carries a spare barrel and extra ammunition, and reloads and spots targets for the gunner. The ammunition bearer carries additional ammunition and the tripod with associated traversing and elevation mechanism, if issued, and fetches more ammunition as needed during firing. The basic ammunition load carried by the crew is 600 to 900 rounds and theoretically allows approximately two minutes of continuous firing at the maximum rate of fire. All crews carry more than the basic load, sometimes three or more times the basic amount if they can get it. In many U.S. units that used the M60 as a squad automatic weapon in Vietnam, every soldier in the rifle squad would carry an additional 200 linked rounds of ammunition for the M60, a spare barrel, or both, in addition to his personal weapon and equipment.

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