Feature：

➤ Tokyo Marui VSR10 series/MLC-338/MLC-LTR series sniper rifles exclusive
➤ Bore-up and increased air volume cylinder, used with bore-up piston (do not mix with ordinary VSR cylinder)
➤ Needs to be used with "MAGNUM" Magnum VSR bore-up cylinder bore-up bolt carrier (please do not mix with ordinary VSR bolt carrier)
➤ Needs to be used with "MAGNUM" Magnum VSR bore-up cylinder head (please do not mix it with ordinary VSR cylinder head)
➤ Not include internal parts