The BT-4 Spring Kit allows adjustments to be wider then the stock velocity adjuster can do. Four springs ranging from high to low strength can be easily installed in either BT-4 combat markers or Tippmann 98/A5 guns. Pick these up if you are experiencing spring wear or want to customize your marker to shoot exactly what you would like it to!
- 4 Different Spring Strengths colour co-ordinated
- Get a wider range of velocity adjustments
- Fits in Tippmann A5/98 or BT-4 Combat