BARREL LENGTH: 24 PROOF RESEARCH CARBON FIBER – BARREL MATERIAL: CARBON FIBER – BARREL FINISH: CARBON FIBER – THREAD PITCH: 5/8 X 24 – GAS SYSTEM: RIFLE – GAS BLOCK DIAMETER: .936 SURERLATIVE ARMS ADJ GAS BLOCK – BCG: NITRIDE – TRIGGER: CMC 3.5 FLATBLADE – MUZZLE DEVICE: MLR BRAKE – STOCK: LANCER CARBON FIBER STOCK – GRIP: ERGO SUREGRIP – RAIL: APF 15.5 MLOK – WEIGHT: 9.0 LBS – COMES WITH 4 MAGAZINES