PRODUCT DESCRIPTION: This precut Nerf Siege-50 spring has been 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! Moderately difficult modification with many locks and gears trains to work with. This spring has been custom cut and tested to fit the brand new Nerf Hyper Siege 50 Blaster.
FEATURES: • Medium difficulty on installation • One end will be flat/squared, the other will be a raw cut. • Average 140 FPS from stock average at 110 FPS • Cut-to-length compression spring
SPECS: • Material: Made in the USA of USA spring-tempered steel • Dimension: 130mm Long, hand cut, flat on one end.