POF introduces the Revolution DI (Direct Impingement). By popular demand you get the same technology same durability same features and same AR-15 size but in a smaller direct impingement system featuring their 9-position adjustable Dictator gas block and Renegade rail. FEATURES: Nitride heat-treated fluted barrel; SB tactical SBA3 brace; M-LOK Revolution rail; 4.5 lb. drop-in trigger FINISH: BLACK