Airsoftpro spring 9mm M150 for sniper rifles

Reinforced spring for increased power / range of airsoft sniper rifles. It is made of high quality spring steel with proper heat treatment and ground ends. The surface is treated with bluing.

The outer diameter of the spring is about 12.8mm. Before buying, make sure it can be inserted into your piston. The springs are primarily designed for enhanced piston upgrades.

The spring was subjected to tests and the resulting rifle performance at a good seal approximately corresponds to its nominal value.