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有一位美軍Ranger 教官把上面的照片放了上網, 說有一位學員在進行泥沼訓練時, 對教官說"我的槍管飛脫了". 他最後要受罰了, 原因是他沒在山地訓練 (泥沼訓練之前) 告知教官, 他受罰的項目是要用m240 來代替m4 (m240重27磅).
之後有一位叫 keith j 的人解釋了這事情為何發生:
海水滲進了大陽環下面的牙, 太陽環生秀了......它接觸到鋁的上身, 上身也氧化了....鋁的氧化使太陽環生秀的部分還原成鐵粉..........基本上依然是很結實的, 不過在猛烈使用下就飛了出來.
出錯的原因是在槍管安裝的時候, 太陽環扭得太緊了, 使上身的陽極表面破裂了.
當然, 當這東西經歷很長時間的使用, 是很大機會發生的.
以下是英文原文, 出處是: http://www.thefirearmblog.com
“FREEFALLE7″, a Ranger Instructor, posted the above photo at AR15.com. A student, on arrival at the Swamp phase of Ranger School, showed him his M4 and said “my barrel fell off”. His punishment for not telling an instructor at the Mountain phase (the previous phase) about the broken M4 was to be given a M240, which weights 27 lbs, as a replacement.
Keith J came up with a plausible theory of how this happened
Salt water in the threads. Steel rusts. Steel in contact with aluminum. Aluminum then oxidizes, reducing the rust to iron dust. Joint remains tight until it is abused, then it just falls apart.
This all started when the barrel was installed and it was tightened a bit too much, causing the anodizing to crack
Of course this would have happened over a long period of time and use.
Thanks to Jay for the link. |
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