The AirsoftPro steel cylinder was sucessfully tested on the strongest springs.
This model is suitable for: Well MB4401, Well MB4402, Well MB4403, Well MB4406, Well MB4407, Well MB4408, Well MB4409, Tokyo Marui AWS (you need to remove inner nylon o-rings)
Not suitable for Well MB4404,05,10,11.
Cylinder is compatible for the factory original or AirsoftPro pistons or cylinder heads. It is made on high precision CNC machines in the Czech Republic.
If you are unsure whether this will fit your rifle give us a call on 01293 525880.