NOTES FROM LUKE: This precut Rival Knockout from the K25 spring is the perfect upgrade mod for your blaster for greater speed and accuracy. This mod is not for young kids as you'll need to compress the spring a bit when installing in the plunger tube! You can lose the plastic pieces in the handle but everything else should stay where it's at; you only need to remove the plunger tube. Use a flat head screwdriver to remove the cover off the notches and be careful as it sits on a pretty tight fit. This spring has been custom cut and tested to fit the Rival Knockout blaster.
FEATURES: -Easy to Medium difficulty on installation -One end will be flat/squared, the other will be a raw cut. -Average 125 FPS
SPECS: -Cut-to-Length Compression Spring, -Spring-Tempered Steel -Made in the USA of USA steel -About 130mm Long, hand cut, flat on one end.