Latest build i finally got to put some down the tube,
Noveske 13.7 infidel barrel
Noveske gen 1 upper
bushmaster preban lower
bcm kmr rail at 13.", going to get a 15" rail soon.
etc.
Thing ran perfectly, 100 rounds of everything and not one malfunction. Locked open every time. And can't give an official report on accuracy, but no complaints!