Outer barrel - 22'' bull
22 inches heavy bull outer barrel made by CNC. 6061 T6 aluminium, with an inner diameter of 8.56 mm eliminating the necessity of barrel spacers. It accepts inner barrels with a lenght of 590 mm, and a diameter of 6.55 mm or lower (AEG standard size). Muzzle features a 14 CCW airsoft standard barrel thread. Complete hopup unit (SRS407/SRS408) is included, with five M3x4 *e screws, 19x2 oring, 8x2 oring, and pre-installed 5.8x0.75 orings.