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由于M4卡宾枪存在可靠性欠佳、杀伤威力不足的缺陷,美军计划用SCAR(特种部队战斗突击步枪)替换M4卡宾枪。SCAR有两种型号:轻型SCAR采用5.56×45mm口径,重型SCAR采用7.62 x 51mm口径。美军计
Due to the lack of reliability and lethality of the M4 carbine, the U.S. military plans to replace the M4 carbine with SCAR (Special Forces Commando Assault Assault Rifle). SCAR has two models: light SCAR 5.56 × 45mm caliber, heavy SCAR 7.62 x 51mm caliber. US military dollars