What would you say is the best stock AR trigger? I have to say that the Rock River 2-stage is an amazing stock AR trigger. I am sure there are other high-end ARs that come with even better triggers, but compared to other rifles in the same price range (Bushmaster, Armalite, Colt, Stag, CMMG, PSA, etc.), I think Rock River takes the cake. What are your thoughts?