Stainless steel 10.5 inch threaded barrel with Lo-Pro gas block pinned to barrel. 1:7 inch twist rate and bead-blasted finish. Gen III precision machined upper receiver from 7075-T6 with extended feed ramps featuring anti-rotation interface with handguard. Hardcoat type III anodizing with black Cerakote ceramic coating. Raptor amibidextrous charging handle. NSR-9 free floating handguard with 1913 top rail and Cerakote finish. KX5 muzzle device on 5.56mm model and AAC 51T Blackout muzzle device on .300BLK model. All NFA rules apply.