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M249S轻机枪是FN公司推出的M249 SAW轻机枪的半自动型号,主要用于民用市场。该枪与M249原型枪的区别是取消了连发机构,仅能半自动发射,同时由开膛待击改为闭膛待击。其外观和功能基本与M249SAW轻机枪无异,如机匣顶部设有皮卡汀尼导轨和固定式机械瞄具,横闩式保险设在握把上方,可采用弹匣和弹链两种供弹方式。其发射5.56×45mm NATO弹,枪管采用冷锻工艺制成,枪管长470mm,内膛镀铬,全枪质量7.3kg,扳机力20~30N。
M249S Light Machine Gun is FN’s M249 SAW light machine gun semi-automatic model, mainly for the civilian market. The difference between the gun and the M249 prototype gun was the cancellation of the contingency mechanism, which could only be launched semi-automatically and at the same time changed from preoccupied to closed-hearted. The appearance and function of the basic and M249SAW light machine gun is no different, such as the top of the casing with Picatinny rail and fixed mechanical sights, crossbar-type insurance set at the top of the grip, the magazine can be used and two kinds of shells for the bullet . The launch 5.56 × 45mm NATO bombs, the barrel is made by cold forging process, barrel length 470mm, bore chrome, the whole gun quality 7.3kg, trigger force 20 ~ 30N.