MK-4X Spring Set - Upgrade & Downgrade Kit

Take your MK-4X setup further with the Dart Zone MK-4X Spring Set, Upgrade + Downgrade Kit. This performance-focused, customizable kit gives players more control over their blaster setup. Choose the high-powered spring for performance up to 310 FPS or the low-powered spring for a lower-powered setup at 110 FPS, depending on your preferred gameplay style. The kit also includes an L-320mm aluminum barrel for a performance-focused configuration. Whether you're dialing in your MK-4X for competitive play or customizing your setup, the MK-4X Spring Set gives you the flexibility to choose the right performance for your play style. Features High- and low-powered spring options for customizable performance L-320mm aluminum barrel included Designed specifically for the Dart Zone MK-4X Customize your MK-4X for different gameplay preferences Recommended for ages 14+