The guns look pretty nice, and I like the shading on the Deagles.
My main problem is that the clips on the M4A1, SIG 552 and M203 are too "flat" at the bottom. The biggest a gun's image can be vertically before going onto another gun is, AFAIK, 19 pixels. So don't be afraid to curve them at the bottom, it will give the guns a more "natural" look (unless they're supposed to be that way).
I also have some beef with the spelling ("MP5-SD") and the fact that companies aren't mentioned in most cases. However, this is just something I tend to obsess over for no real reason. :\
Otherwise, I can't wait to see how this mod will turn out when it's done. Keep it up.