Caliburn K14 Kit

Ever felt outgunned by those filthy air blasters while using your Caliburn? Ever felt like you could handle a heavier spring?

Enter the K14, a 24.9kg spring with a length perfectly suited to the Caliburn. With this kit you can double the spring power of your Caliburn, increasing FPS significantly. To fit this spring and provide proper alignment three printed pieces are necessary, which I print at 50% infill in PLA. I also use an X-Profile O-Ring which is wonderful for improving the stock seal