These precut springs were tested in our warehouse and feature one flat/squared end with one cut end. Please note that these mods are not meant for small children, as the spring needs to be compressed when installing.

The Ultra 4 Spring, Sledgefire Spring, and the Hypnos Springs have a more difficult install. The Sentry X2 Spring and the Sentinel Spring have a fairly easy install, with the Artemis being moderately hard to install.

FEATURES:
• One end will be flat/squared, the other is raw cut
• Easy to difficult installation

INCLUDES: 
• Handcut K26 Spring

PERFORMANCE: 
Average FPS (Standard Deviation)
• [~120 FPS] Nerf Rival Artemis
• [~130 FPS] Adventure Force Sentry X2
• [~110 FPS] Nerf Ultra 4
• [~80 FPS] Nerf Sledgefire
• [~100 FPS] Buzz Bee Sentinel 

SPECS:
• Material:
• Dimensions: 
   Spring Gauge: 2.0mm (0.08in)
   Artemis Spring Length: 104mm
   Sentry X2 Spring Length: 115mm
   Hypnos Spring Length: 116.4mm
   Ultra 4 Spring Length: 128mm
   Sledgefire Spring Length: 108mm
   Sentinel Spring Length: 110mm