All original except for 2 parts: a SilencerCo ASR mount was put on in place of the LaRue Tranquilo mount, and I don't have the old mount anymore; and I put an extended latch charging handle on it in place of LaRue's mil-spec style handle.
18" PredatAR barrel, 1:8' twist, extremely smooth functioning, sub-moa with ball ammo, even better with handloads. It was going to be my coyote rifle, but I have too many kids now to even think about having extra time for that.