[jessaustin]

I'm sure your general point is somewhat correct, but how is "This is my rifle" political? It seems more like a commitment to professionalism, like the Hippocratic Oath, but inverted.

[vacri]

Before God, I swear this creed. My rifle and I are the defenders of my country. We are the masters of our enemy. We are the saviors of my life.

So be it, until victory is America's and there is no enemy.

It's basically saying "I will be an effective soldier for America". It's just one of many things working together to that end.