very nice sculpt indeed
the mouth is excellent.
I think his cover (hat) needs to sit down lower on his head. Notice on the real guy (R. Lee Ermy) it at about the level of his eyebrows. Also, it should probably sit a little lower in the front. DI's tend to wear them as such. And I think the brim is a little small and should be absolutely flat, not slightly turned up. I'm a little picky about the subject, having been exposed to their unique brand of hospitality for 3 months at Parris Island.