SHS Aluminum Air Seal Nozzle for MP5 AEG Series
7075 Aluminum Construction
Suitable for MP5 Series Airsoft Rifle
This Oil Lubricated Air Seal Nozzle increase the air tightness of the cylinder
Inner O-Ring for better sealing (Double O-Ring)

As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed