Worker Mod Modification Upgrade spring For NERF N-STRIKE ELITE STRONGARM Blaster/Nerf Rebelle Spylight Blaster/Zombie Strike Flipfury Modification Upgrade spring For NERF N-STRIKE ELITE STRONGARM Blaster/Nerf Rebelle Spylight Blaster/Zombie Strike Flipfury 100% new brand and high quality Make your gun more powerful with this upgrade spring Please make sure the spring fit your gun before you place an order Blaster not included.