The OOD Siege-50 upgrade Spring increases the FPS and range of the blaster.  This spring is an OOD exclusive and is made of zinc-coated spring steel.

FEATURES:
• Compatible with Nerf Hyper Siege-50
• Zinc Coated Steel Construction

INCLUDES:
• 1 Siege-50 Spring

PERFORMANCE:
Average FPS (Standard Deviation)
• 141 (2) FPS

SPECS
• Material: USA-made, Zinc-coated, spring-tempered steel
• Type: Compression Spring
• Dimensions:
     Spring Gauge: 2.0mm
     Length: 130mm
     Diameter: 24.6mm
     Coils: 13.5
• Squared: Both Ends

LINKS:
• Siege-50 Hop Up
• More Springs