Oh wow. Looks great! I'm glad someones finally doing someone who hasn't been done before. I can't think of a single Barret Model Swap Mod.
Well, heres some constructive critisism for ya'. :3
Well his head needs to be a tad pointer at the top. And the bottom of his head needs to be way wider and flat. He should look like a triangle that goes flat three quarters up.
Also, he doesn't seem to have much of a beard, this saddens me
Except for that it looks great!!