M240轻机枪作为美军的主要单兵制式装备之一,以其卓越的可靠性而闻名。老款M240机枪的机匣大量采用铆接工艺,从而增加了全枪的质量,而且铆接部位存在被腐蚀和长期使用发生松动的风险。巴雷特公司最新推出了一款改进型的M240LW轻机枪,该枪在机匣加工中采用焊接工艺代替了原来的铆接工艺,进 M240 light machine gun as one of the main military equipment of the United States, with its excellent reliability and is known. The old M240 machine gun casing a large number of riveting process, thereby increasing the quality of the entire gun, but there are parts of the riveting corrosion and the risk of loosening of long-term use. Barrett recently introduced an improved M240LW light machine gun, the gun in the casing process using welding instead of the original riveting process, into