I agree with Mace, the render is not so good, there is a lot of artifacting and blotches that shouldn't really be there. I also think its a little weird to have that dark area to the lower right of the ODST, when the rest of the sig uses very bright C4Ds.
List: -sig is too small in dimensions (you need more space to work with) -text is too large and noticable -Your focal is actually not on the ODST's face but on his hand/gun. i suggest you either erase the hand/gun or make it far less prominent. -border should be 1px black -C4Ds could be used a little better but not bad.