The only I'd "correct" about this picture is the hand that holds the gun. The fingers seem too symetrical, and aligned for that angle... If you know what I (try to, at least) mean... :S
And I'd not put the elbow in that position... but that's more subjective, I guess..
Oh.... that makes a lot of sense... u^_^ I must admit I thought of that possibility. But if those aren't his fingers.... how is he holding the gun? (don't need to answer that.. hehe... just wanted to see if I can get what you originally drew. Maybe it was right, but I just can't see it... u^^ )