The XM8 is of modular construction and barrels of different lengths and weights can be interchanged to meet tactical needs, producing carbine, compact carbine, sharpshooter, and ?是什么意思_The XM8 is of modular construction and barrels of different lengths and weights can be interchanged to meet tactical needs, producing carbine, compact carbine, sharpshooter, and ?在线翻译_英语_读音_用法_例句