Steyr Evo velocity spring (often referred to as the pressure spring, Position No. 52 or 51) is a crucial internal part that regulates pellet velocity and air release in the Steyr Evo 10 and Evo 10E air pistols. Here is the essential information on how the spring works, how to adjust your velocity, and where to source a replacement:1.
Spring & Velocity Adjustment Function: The pressure spring dictates the hammer tension, which in turn controls the valve opening time.
The ideal velocity setting for an Evo 10 air pistol is between 155 m/s and 160 m/s. Setting the velocity too high (e.g., over 160 m/s) can introduce unwanted recoil and vibration, affecting your groupings