Outer barrel - 650 mm carbon
650 mm lightweight carbon outer barrel made by CNC AL 6061 T6 and carbon fiber tube. 3 barrels spacers are including. It accepts inner barrels with a lenght of 650 mm, and a diameter of 6.55 mm or lower (AEG standard size). Complete hopup unit is included, with five M3x4 *e screws, 19x2 oring, 8x2 oring, and pre-installed 5.8x0.75 orings.