Worker Jupiter Upgrade Springs


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Upgrade your Rival Jupiter with one of these springs from Worker.  Your choice of 14kg or 18kg spring ups the power of the Jupiter so you can feel like a marksman!

Blasters should be modified at your own risk by an adult or with adult supervision. Modification of blasters may increase wear and reduce lifespan of blaster. Always wear eye protection. Never point at someone’s face. By purchasing, you agree that FoamBlast is not responsible for injury or damage caused by misuse or accidental usage.

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