Dart Zone Mk4 Upgrade Spring

The Dart Zone Pro Mk-4 Upgrade Spring is a high-power spring designed to get more out of your DZP Mk-4. Combined with the Mk-4's quick swap spring system and gasketed barrel extension, this spring makes it easy to tune your blaster to your desired high-cap FPS.

Average FPS (standard deviation)
• without FPS+ barrel*  - 225 (4)
• with FPS+ barrel - 275 (4)

*This spring was chronographed with the injection-molded SCAR included with the DZP Mk-4 when possible.

FEATURES:
• Compatible with the Dart Zone Pro Mk-4 blaster
• Easy to install
• Reliable performance improvement

SPECS:
• Material: Spring Steel
• Dimensions: 1.6 x 350mm

ADDITIONAL LINKS:
• Product Name w/ Hard Link That Opens in Same Window
• Second Product Link