Believe it or not that is pretty much how the grip looks (except the dark part follows around the back, which will be done with a skin, and the top of it needs to come up some).
What about the trigger looks off? Is it the width of the trigger guard, the shape of the trigger itself, what?
I got a bit lazy on this render but at least it looks better than on a black background. The guns are, again, on orange furniture. This time they are sitting on an end table next to a lamp. Though, I cropped out most of the picture to save space because it sucked and I didn't want to do it again.