I ran an armory in Israel for about 2 years. We had a bunch of M14s that were all similar in color to your fresh one. In addition, I did my M113 driving course at the same base as the IDF sniper school. Some of their trainees were tented 2 over from mine and I saw their rifles frequently. Mind you, I was seeing sniper-trainee rifles, but I don't recall seeing any that were oddly or differently colored.