XYL M870 Upgrade Springs

1.3/1.4mm Springs Introduction：

The XYL M870 nerf blaster springs are compression springs compatible with the XYL M870 nerf shotgun.
Upgrade your stock spring to a new level with this series of enhanced springs.

Features

• XYL M870 1.3mm / 1.4mm springs
• Tune your blaster for a higher FPS cap!
• Performance: With the 1.3mm spring installed, the M870 Nerf Shotgun can reach 229+ FPS.