The Faxon Sentinel .308 AR-10 Rifle combines excellent features with great value for the end-user. As part of Faxon’s Summit Line of firearms, the Sentinel has a custom look and feel right out of the box. At the heart of the Sentinel is Faxon’s Match Series Heavy Fluted Barrel. Machined 100% in-house in Faxon’s greater Cincinnati facility. The barrel is made of 416-R stainless steel, and features 5R rifling, NP3 coated barrel extension, and a salt bath nitrided finish.