Looking sick. Don't be afraid to use less loops when trying to define the form, it will help clean up some of the areas and make the wire flow more. Also, a lot of your vertical edge loops could be perfectly straight, but for whatever reason they're diagonal or some of the verts are slightly off. Perfectly straight loops…
computron, hey your Halo 4 Battle Rifle looks great. I am not much of a modeler in means I do not do it all the time but one good practice is to avoid more than 4 sides. Or more than 4 points/vertices/edges. Also to avoid having anything less then 4. I know that is a pretty well known thing when it comes to modeling, but…