I dig what you have done with the updates. Personally, the scope rail on mine is going to be silver. I know there are inconsistencies (as with most onscreen props), even the Wired photos show an end cap upside down. Those of us who do costumes can attest to little differences here and there, too (greeblies missing on some scouts, etc). It's just my preference to baseline it and silver is the direction I'm going with mine.
However, the white option allows a customer to easily paint theirs silver, if so inclined. So either way I think your product looks nice man. Kudos!