NOTES FROM LUKE: This precut Rival Kronos spring cut from the K25 has been tested by the OOD team as a perfect upgrade mod for your blaster. This mod is not for young kids! You'll need fairly strong hands to prime this spring. This spring has been custom cut and tested to fit the Rival Kronos blaster.
FEATURES: -Medium difficulty on installation -Both ends flat/squared -Average 125 FPS -Easier to prime than the previous version, yet higher FPS!
SPECS: -Cut-to-Length Compression Spring, -Spring-Tempered Steel -Made in the USA of USA steel -3.7" Long, hand cut, flat on one end.