Posting this here just in case. I was having issues using Krait in PvP because the flinch on it was so bad, and without thinking too much about the archetype in general, I made this post [url=http://www.bungie.net]here[/url].
But after testing some other Rapid-Fire Frame auto rifles, I noticed that it was the only one that had this issue. What I don't remember is it being this bad before all of the sandbox changes we have now. It doesn't matter if you put it against another auto rifle of the same type and have a shoot-out between users of roughly equal skill, the other auto rifle will win because Krait will flinch that badly, doesn't matter how stable the roll is or how many Unflinching mods you have.
So now I'm wondering if this is unintentional. I've tried out Dark Decider and Chroma Rush just recently. They are perfectly fine. You lose with them, it's because of a skill issue or, for various reasons, the hand cannon user you're fighting just doesn't miss headshots.
I play on controller on Steam. I cannot currently provide any video footage of using any of the above auto rifles due to software issues and Windows being Windows.