Guarder SP85 AEG Tune-Up Spring

Reliable and excellently crafted Guarder spring, made from oil-dipped and heat-treated SiCr spring steel. The nominal strength indicates the expected value in m/s (meters per second) with 0.20g ammunition. The stated nominal value is a guideline; actual muzzle velocity depends on system sealing and installation. Effective values may deviate; it is recommended to test various components for optimal results. For systems with excellent sealing, lower nominal values should be selected.