PDI Inner Barrel 6.01mm for Tokyo Marui Hi Capa GBB Airsoft Pistol (163mm, Stainless Steel SUS304)

Stainless steel made precision inner barrel for Tokyo Marui Hi Capa 5.1 GBB Airsoft Pistol. Internal diameter 6.01mm, which increases the shooting precision and power due to the tight bore. You can increase the fps a lot by using this inner barrel. Use this barrel if you intend us to install an IPSC style long slide with compensator or 7 inches outer barrel. Longer inner barrel creates more power and increases accuracy!