Busta, WC also makes colored recievers. I forgot about them, and I'm sure there are many other companies that do so.
M-Dog, does anyone make a replica clubfoot in OD? That would be nice. Since you're going for the colored-but-not-because-of-paint look, the colored stock would look great!
And yes, it will look MUCH better with a constant-diameter barrel. That is a definite non-military looking rifle, so the barrel seems a bit out of place. Take some pics with the small front section installed, bro!