The parts are under spring tension and require special tools for removal. It is not necessary to remove the gas pressure regulation valve assembly (from its location inside of the barrel ring guide/gas cylinder) to perform cleaning. You should note that all gas system parts on the A-500G have been given extra protection against corrosion: the magazine tube is chrome-plated, and all other gas system parts, including the piston, springs, barrel guide ring and gas regulation valve, are made from stainless steel.
Complete the cleaning of the gas system by applying a very lighi film of Browning Oil to all parts for protection and lubrication.
Brush Any Deposits From the Gas Cylinder
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