PRODUCT DESCRIPTION: This custom Rival Kronos spring has been manufacture and 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 built and tested to fit the Rival Kronos blaster.
FEATURES: • Medium difficulty on installation • Both ends flat/squared • Average 135-140 FPS
SPECS: • Cut-to-Length Compression Spring, • Material: Made in the USA of USA spring-tempered steel • Dimensions: 3.7" Long, flat on both ends