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Aggressive Choice in Upgrade Spring was AWESOME.....While It Lasted. : r/ Nerf
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FOR Nerf Rival Takedown Blaster High Power K25 Coil Spring Mod Upgrade Take Down | eBay
For Nerf Hammershot Blaster 8.5KG Spring Mod Upgrade Zombie - Etsy
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Spring Thunder Shotgun – Frontline Foam
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Nerf N-Strike Elite Retaliator Spring Replacement - iFixit Repair Guide
Nerf Kronos Spring Spacer – Foam Technician
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Rival Vision Spring (135+ FPS) – Out of Darts
Nerf Rival Pathfinder 11/16KG Modification Upgrade Spring Coil - Etsy
