I think the textures really bring it to life, a very nice model
If I look really hard to try and critique anything it would be the magazine on the machine gun, maybe its too clean? or it should be brown not green? Only a personal opinion though, I'm sure you've looked at more references then me to know.
Eeeerm, well, I don't really know how it should look like . I think that there are many mistakes in the model which I'm not proud of (the limit of the polys was not decided thoroughly - more should've been used but it was planned to move in the animation real-time, not pre-rendered). I actually uploaded this for it's overall look coz I liked it . I'm glad you do as well, thanks!