Additional barrel nut for HAO MK16 handguard .(Barrel nut is included in the handguard purchase ) Anodizing/surface treatment disclaimer :Anodizing is a serious chemical process that is fairly unstable. The shade of color can vary batch by batch. We do our best to make the color as correct as possible but we can NOT generate if the shade meets your imagination. Also to be noted that every monitor has its color differences. The color of the object and the color on your computer/ mobile device may be different. Made in Taiwan BB type: 6mm 0.2g BBs Power source: 11.1V PTW, AEG / 9KG green gas GBBR Power: 90 m/s = 0.81J with 0.2g BBs J / cm2: 2.835 J/cm2 Design and manufacture for Airsoft use. No live ammunition using function.