.338诺玛马格南（8.6×64mm）口径的新型机枪将使美国陆军的有效射程，比现役的7.62×51mm口径M240系列机枪要远得多。美国陆军正在考虑口径转换套件，使其现役的M240B和M240L机枪也可以发射6.8×51mm弹药。

From dogfights to epic bombing runs, these 10 military aviation films soar with real aircraft that bring authentic air power ...