Feature：

➤ Tokyo Marui VSR10 series/MLC-338/MLC-LTR series sniper rifles exclusive
➤ CNC aluminum alloy bore-up piston, used with bore-up cylinder (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)
➤ 7075 aluminum alloy CNC turning and milling process