G&P 6.03mm Tight Bore Inner Barrel for Marui M4A1 MWS GBB (330mm)

G&P 6.03mm Tight Bore Inner Barrel for Marui M4A1 MWS GBB (330mm) Metal Construction High grade precision barrel at 6.03mm diameter for extra power and precision shooting Suitable For Tokyo Marui M4A1 MWS Series Gas Blow Back GBB Rifle Airsoft Guns