Faxon Firearms Barrel .224 Valkyrie Heavy Fluted Profile Rifle Length 20 inch 1-6.5 Twist 5R 1/2-28 Thread 416R Nitride Black 15BV65R20FHQ-5R-NP3. 224 Valkyrie Profile Barrel. These AR15 Barrels from the innovators at Faxon Firearms feature a heavily...