Inconsistent
There's a certain line between realism and the stylistic alterations you make, and this picture crosses between those lines a lot. For instance, the grip on the gun looks very, very realistic, while the lack of reflection on the barrel could have looked much more realistic (especially with background objects to give a surface to reflect light from). The bolt on the handle is a little too simplistic, and the curvature around the trigger is too kinky and segmented. I dunno, but something about it seems off.
I do like it, though.