The force of this spring is about 160% of the force of original T.Marui spring. It also has a rubber pipe inside the spring. The stainless steel wire avoids oxidation inside the nozzle. This 160% spring is good enough to pulls the nozzle back into bolt-carrier faster after BB has left the barrel. Therefore, this spring enhances better recoil action and minimise jamming BB during loading. It also does not interfere the shooting power.
All products are for airsoft only. They are not made for real steel firearms.
