PDI 01 6.01mm Precision Barrel for Marui Hi-Capa 5.1 Airsoft GBB (138mm)

PDI barrels are cold-hammer forged from stainless steel, which is the same process how real rifle barrels are produced. They have a superior tolerance and roundness of the inner surface compared to anything else on the market. PDI 01 6.01mm Precision Barrel for Marui Hi-Capa 5.1 Airsoft GBB (138mm) Stainless Steel Tightbore Upgrade Barrel Internal diameter 6.01mm built for precision shooting Genuine Products by PDI Advance Technology forming by Cold Forging on Stainless Steel result in tolerance no more than Suitable For Tokyo Marui Hi-Capa 5.1 Series Airsoft Gas Blow Back GBB Pistol