I think I know what's wrong with that clear back of light tube, it's probably missing the final paint (or just test molding in clear instead of final black plastic?). Digging up the reference pics from trailers it seems to be dead-on to the high-res trailer model.
Honestly kind of irritated after just recently purchasing TC's gun kit and Crix's lights. I don't want to see everyone and their mom running around with one I can't be sure of the quality though, it does look a little long.
Well as TMBountyHunter pointed out, they used the hi-res model from the commercials as their point of reference. I can assume "hi-res" is the appeal of that model, but it's not the one in the game. Proportions and curves are needlessly changed. I personally would rather a replica be based off of what was in the actual game, not off of promo material.
Still looks nice, I might pick one up, but I think the fans have done better.