If it were me, i'd origin it a little bit more to the right and maybe down a tad. just cuz guns that hog the center of the screen really make it difficult to play :\

but other than that it looks great. the forearm placement is perfect, so mad props for nailing that :D

and yeah, as EMDG pointed out, the thumb could stand to be more flush against the grip, but besides that i love it (in an entirely non-homosexual way of course)

Hold tighter to the grip

pretty much left for CDG