Deep Fire Metal Nozzle 
Essential part for upgrading your Airsoft AEG 
Tighter sealed air nozzle ensures more barrel exit muzzle velocity 
Increased air flow and forms a tighter frictionless seal between your cylinder head and barrel 
This Oil Lubricated Air Seal Nozzle increase the air tightness of the cylinder 
O-ring construction inside for the tightest seal 
Direct replace the original air nozzle of Airsoft Electric Gun
As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed