Why no Faxon? Any solid evidence? User preference? I've built my last 7 AR's off their barrels and have loved the results I've been getting.You need to call ARP. AR Performance. Be has been developing Grendel.and 6.8 barrels for a long time. I have used several of his barrels over the last 6 or 7 years. Even though it might out of stock call him anyway. He does that to limit the orders he has to process. He know those barrels up and down. I would rule out Faxon right off the bat. Ballistic Advantage is a contender seeing is they have a 1 MOA GUARANTEE.AF 100 YARDS of course. I would say talk to ARP and then choose between those two.