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M16/M4系武器是美军及美国一些执法部门的制式装备,有些使用单位常根据自己的任务性质对这些武器进行改装,如图中即是经过改装的M4卡宾枪。该枪采用了加长型枪管,用以提高射程,枪口加装了消声器。其并没有采用顶部带皮卡汀尼导
M16 / M4 weapons are the standard equipment of the US military and some law enforcement agencies in the United States. Some units often modify these weapons according to the nature of their mission, as shown in the modified M4 carbine. The gun uses an extended barrel to increase range and muzzle mufflers. It does not use top with picatin