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Systema Bore Up Cylinder Type-4
Artikelnummer: ZA-04-05This is a highly recommended upgrade for AEGs 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.
Remember to get some silicone cylinder grease to lubricate the walls of the cylinder and piston O-ring to ensure smooth operation.