The Daniel Defense 18" M4v7 Pro Complete Upper is the same complete upper receiver assembly used on their M4v7 Pro complete rifle. Using top quality components from their entirely in-house produced cold hammer forged barrels, lightweight free float MFR XS M-LOK handguards, and better than Mil-Spec M16 bolt carrier groups means that you're getting one of the best uppers available for the AR-15.Features:Soft shooting rifle length gas system.Chrome lined 41V50 chrome moly vanadium steel barrel with manganese phosphate finish.M16 cut MIL-SPEC bolt carrier group with properly staked gas key and chrome lined bore.15" MFR XS free float M-LOK handguard provides plenty of accessory space.Effective flash suppressor helps tame flash.Hand assembled, quality checked, and test fired before leaving the Daniel Defense facility.