Check out the VTac flashlight mounts they are durable and affordable and they make a tan one. For the optic go with the Tan EOtech 553, those should complete your gun and match you color scheme.
Well - the VTac is the one I was looking at (that and the VLTOR one for quite a bit more money), but their Coyote Tan one isn't quite FDE (though it would match my Vicking Coyote Tan Sling). I really want a black one, though I have now broken out the DuraCoat... I guess I could get whatever color they have available.
That 553 is awesome, but its probably out of my price-range right now (and with Duracoat as an option, I'll just hit up a regular 511 or something if I wanted that affect bad enough).
That 553 is bad ass though