Spring M150 16672

Manufacturer	Spring
Model Number	9-311

Description
The ULTIMATE Upgrade Series doubled progressive springs make sure the torque of the motor is used to its full extent giving a higher rate of fire.
Must be used with appropriate ULTIMATE upgraded internal components to secure the best performance and durability.The ULTIMATE springs are named M100, M110 etc. according to their expected tension in meters per second measured when using a 0.20gr BB and a 300mm long barrel. In turn, a M110 spring would give 110 m/s. To convert to feet per second (fps) simply multiply by 3,28, e.g.: ref. 16671 M120 120ms/394fps.