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M67 90MM RECOILLESS RIFLE  

2011-07-04 12:53:01|  分类: 影像韵味 |  标签: |举报 |字号 订阅

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M67 90MM RECOILLESS RIFLE - 司古 - 司古的博客

The M67 recoilless rifle was a 90-mm antitank weapon made in the United States and later in the Republic of Korea. It could also be employed in an antipersonnel role with the use of the M590 antipersonnel round. It was designed to be fired primarily from the ground using the bipod and monopod, but it could also be fired from the shoulder using the folded bipod as a shoulder rest and the monopod as a front grip. The weapon was air-cooled and breech-loaded, and fired fixed ammunition. It is a direct fire weapon, and sighting equipment for this purpose was furnished with each weapon.
Introduced in the early 1960's, the M67 primarily saw action during the Vietnam War. It was later replaced by the TOW missile system in 1970 and the M47 Dragon anti-tank missile system in 1975.
It was retained for use in special conditions. For instance, in arctic environments the batteries of the Dragon and the wires of the TOW would fail due to extremely low temperatures. As of 1988, the 6th Light Infantry Division in Alaska was still using the M67 in its special weapons platoons, but the unit is no longer headquartered at Ft. Wainwright. Similarly, the urban setting of West Berlin prompted the Army to keep the weapon with the Berlin Brigade as late as the mid-1980's. The Rangers retained the M67 in its Weapons platoons until it was replaced by the 84mm M3 Carl Gustav in the 1990s.
The M67 is shaped like a long tube with the sight assembly and trigger offset to the side in opposite directions about half way along the barrel. Under this point is the monopod, with the bipod halfway back from there. The weapon required a crew of three to operate it; a gunner, assistant gunner (loader) and ammo bearer. The breech is hinged on the right side, and had to be swung open to load the round. It was then swung closed and when the rifle was fired, the rear end of the shell case broke up and was blown out of the back of the breech block. On the left side of the barrel, near the sight and trigger assemblies, was an asbestos heat shield to protect the gunner's shoulder and neck from the heat of the barrel when firing.
It was capable of maintaining a sustained fire rate of 1 round per minute, but the weapon could also be rapid fired at an increased rate of 1 round every 6 seconds (10 rpm) by a well trained crew. The rapid firing was limited to 5 rounds, with a mandatory 15 minute cool-off period afterward.
The M49A1 sub-caliber device, which uses NATO 7.62-mm rounds, is typically used for zeroing the sight and for qualifying purposes. The sight would be visually zeroed by setting crossed strings over the gun barrel opening (there was a rubber loop and notches at the end of the barrel to facilitate holding the string in the correct position), then looking through the barrel of the sub-caliber device (and crossed strings) and setting the fixed stadia, reticle sight to the same target. The sub-caliber rounds could then be used to further refine the zero and to qualify.

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