An excellent shot - nice tones, well-focused and a dramatic mood. It would have been even be more interesting and professional if you'd add the facts. The fact that it's an air gun and not real military, doesn't make it a less relevant picture, quite the contrary. A young photographer from my town got a World Press award for covering similar people in South Africa. After all, the real danger is in what's in people's heads.
Sincere congratulations with your DD for a job well done.