M14狙击型——M21与 M25虽然 M16在越南战场上全面取代了M14,使美军在200～300m 射程上的火力大为增强,但在进行远距离精确射击时,M16则显得无能为力,美国陆军司令部认为急需配备一种新型的狙击步枪。1966年,美国陆军武器司令部、战斗研究司令部、有限战争委员会与美国陆军射击训练队一起共同研究新型狙击步枪的设计方案。他们将所有能使用的军、民用枪与各种瞄准镜和枪弹配合使用,并根据他们自己制订的原则标准和精度标准,最后选择了 M14NM 半自动步枪,将其改 M14 sniper - M21 and M25 Although the M16 in the Vietnam battlefield to replace the M14, so that the U.S. military in the 200 ~ 300m range of firepower greatly enhanced, but in long-range precision shooting, M16 is powerless, the US Army Commander Ministry that urgently needed a new type of sniper rifle. In 1966, the United States Army Weapon Command, Combat Research Command, the Commission for Limited War and the United States Army Shooting Training Team worked together to study the design of a new type of sniper rifle. They used all the available military and civilian guns with a variety of sight and bullets, and according to their own set of principles and standards of precision standards, and finally chose M14NM semi-automatic rifles, the change