Battlefield Themed Composite

Hello, Iv been taking photo's mainly as a form of fun stress relief for a while now. But not long ago I discovered compositing when I came across a local photographers website http://www.derek-johnston.co.uk/ << check it out he has made some amazing images. Since discovering this I have been trying to learn the skills to make my own images. Here's one I made the other day whilst I was off sick from work, As the title suggests the idea for the photo came from the coverart of the battlefield games. I did not shoot the original pictures! I only composited them together to practice the photoshop side of things. i'd love to hear some feedback.

Thanks!