The light weight barrel profile has a barrel service life of 10k rounds, and is sub-MOA out to 600 and beyond. I have to ask, why one would want a heavier barrel? What is the perceived advantage? The Pred is not a precision rifle, but a GP battle rifle that happens to be sub-MOA capable. If you want a precision rifle, then the OBR with the heavier barrel profile is the solution in LaRue's current offerings.
I am very happy with the LaRue PredatAR. I was impressed during the T&E period, as were several co-workers. Impressed enough to drop nearly $40k out of pocket by guys for the private purchase of the 7.62 Preds, when the SCAR-H and KAC Mk11 are readily available for free.
Just sayin.............