FPS Softair Aluminium Air Nozzle with Inner O-Ring for M4/M16

Increase your electric M4/M16s power and air efficiency with an upgrade nozzle and O-ring. With its CNC Aluminium Ergal construction with smooth anodized finish, this will make a grade enhancement over your stock nozzle to used with version 2 gearboxes. Make sure to use pure silicone oil to lubricate your cylinder head's nozzle stem before installing this nozzle.