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 Maruzen Type 96 and chinese copies such as Well MB-01, 04, 05, 08..etc. It is made on high precision CNC machines in the Czech Republic. Not suitable for VSR or BAR 10! Weight 180g.