The Eclipse Shaft 4 has been developed specifically to improve efficiency, consistency, and accuracy.
Tune your marker further with the Shaft4 Boost Kit to better accomodate the type and size of paint. Each kit includes 2 barrel backs in bore sizes .685 and .693.
The Boost kit is manufactured using the same high grade aluminum to the same exacting standards as all other Shaft barrels.
Please note all anodizing varies from batch to batch. Your Shaft 4 Boost kit may be a slighlty different tone than your marker (Eclipse makes no guarantees that the anodizing will match your marker or barrel).