Nice set up. I'd have liked there to be more shadow in the image to give it more of a noir feeling - especially the upper area where the foot of the desk meets the wall. And the bright spot between the camera and the cap should instead have focused on either his face, or the gun, instead of a blank piece of carpet.
Not bad. I would like to see some more dynamic lighting to provide interesting shadows in the shot. Right now it looks a little flat to me for "film noir".
I like this shot primarily because of the composition and the props used. With the more dramatic lighting and more natural position of the gun this may have been an 8-9 from me. Nonetheless great job! 7