A tightened with an O-ring nozzle made from polymer, intended for power tuning. The seal fulfills not only a tightening function, but also provides better slide of the nozzle at the tip of the cylinder head, thus allowing for its operation to be faster and having a lesser wear on parts. The seal allows for the utilization of the entire amount of pushed by the piston air for propelling the BB by a barrel.
Special shape of the nozzle and its tips makes the air better directed and the BB better centralized. The result is an increase in muzzle velocity of a replik