TYPE : AEG LENGTH : 700mm WEIGHT : 2990g VELOCITY(FPS) : 320 (According to Your Local Regulation) INNER BARREL LENGTH : 290mm INNER BARREL DIAMETER : 6.02±0.01 MATERIAL : CNN All Metal FIRE MODE : Safe/Semi/Full Auto COMPATIBLE MAG ITEM NO.: HK-04 MAGAZINE : 300 rounds (Hi Cap Magazine) BATTERY : 11.1v Lipo Recommended 7.4v HOP-UP : Adjustable GEARBOX TYPE : V2 Gearbox BEARING DIAMETER : 8mm GEARBOX MATERIAL : Metal PLUG TYPE : Mini Tamiya BARREL THREAD TYPE : 14mm CCW