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原帖由 Kungz 於 8-12-2010 16:24 發表 
5.56 X 45mm NATO 唔係SS109/M855咩？MK262好似剩係米軍特種部隊有用…另外好似到而家都仲未有可以保證一槍殺死人既輕武器出現…
師兄 M855(SS109)只係5.56NATO既其中一種. 而輕武器/Small Arms
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Small arms is a term of art used by armed forces to denote infantry weapons an individual soldier may carry. The description is usually limited to revolvers, pistols, submachine guns, carbines, assault rifles, battle rifles, multiple barrel firearms, sniper rifles, squad automatic weapons, light machine guns, and sometimes hand grenades. Shotguns, general purpose machine guns, medium machine guns, and grenade launchers may be considered small arms or as support weapons, depending on the particular armed forces.
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In the U.S. military, small arms refer to handguns or other firearms less than 20 mm in caliber, and including heavy machine guns (typically .50 caliber or 12.7 mm in U.S. service).[1] The NATO definition extends to "all crew-portable direct fire weapons of a calibre less than 50 mm and will include a secondary capability to defeat light armour and helicopters."
