Steel durable cylinder is required in case of any upgrade. Stock cylinder is made of aluminium and weak. It is easy to damage it with stronger upgrade spring. Our AirsoftPro steel cylinder was sucessfully tested on the strongest springs. 

This model is suitable for Well MB-02,03 bolt action rifle. It is made on high precision CNC machines in the Czech Republic.

Cylinder fit also on VSR rifles, but inner diamater is small for original plastic pistons. Please use our aluminium pistons for VSR or together with 90° CNC trigger set.