thank you franklyn,
this is actually my second high poly model, so i'm still learning

.
i modelled it in approx. two weeks working on and off in my spare time, then another week of experimenting with Vray since i had never used it before,
it has around 400,000 polies,
i started with the body then fans, front camera thing then the gun.
all modelled using the edge extrusion method.
background is part of this photo from google images: , touched up in photoshop.
Cameron, thank u so much for the crits, i guess i did add so many edge loops where i didnt actually need them, i'll keep that in mind next time i'm modelling.
and i guess u're right about the window frame, i'll see if i can fix that..