User blog comment:ChishioKunrin/My view on Dust (so far)/@comment-24620600-20140307092353/@comment-10380701-20140307105811

That's not his point though. Chishio's blog focuses on the idea that Roman was holding a Dust crystal when he fired his weapon, which is the reason it's shots were red in the first place.

Which is semi-disproven as he does shoot red bullets during episode 16.