NEW from Parabolic, the updated Phi 2.5 in autococker threads features the Phi’s internally cut 8.6 inch control bore and .005 inch step bore for the highest velocity possible from your marker allowing you to run the lowest pressure possible for a quieter, softer, more consistent shot than ever before.

Each Phi 2.5 kit comes with 4 dual bore one piece barrels sized .675-.680, .680-.685, .685-.690 and .690-.695 with a hard case to keep your investment protected when not in use.