英语翻译there should be a machine gun spirit in those who handle

英语翻译
there should be a machine gun spirit in those who handle the new weapon--a spirit of enterprise and dash,of readiness to seize the fleeting opportunities that offer themselves amid the confusion of the battlefield for the sudden intervention of the death-dealing weapon.
意思是说机枪精神,主要是后面amid the confusion of the battlefield for the sudden intervention of the death-dealing weapon这几个介词后面的部分不知道如何理顺,请高手翻译一下这个句子.
以后的热情帮手请不要再用翻译器，一楼的一看自己都不懂。