Systema Bore Up Cylinder Type-3 for Tokyo Marui PDW

Systema Bore Up Cylinder Type-3 for Tokyo Marui PDW Metal Construction Design For Upgrade the Original Parts Suitable For Tokyo Marui PDW Series Airsoft Rifle with lengthened barrels since you will need additional volume of air to propel the BB out of the longer barrel - to avoid back-pressure. These bore-up cylinders actually have the same external dimensions as a stock cylinder so they will fit into a standard gearbox.