Designed specifically for the Huben GK1 air pistol, this fill port protector by Wolfiek Group shields the charging port against dust, moisture, and grit. Made from PET via high-precision 3D printing, it integrates flush with the weapon without protruding — preserving the original lines of the GK1 while a 4 O-ring hermetic seal completely blocks micro-particles from entering the port.

A built-in drainage channel evacuates air to the exterior in the event of a port leak, preventing internal pressure buildup before it becomes a problem. During the charging process, the protector releases automatically when pushed by the fill probe — no tools, no fumbling, no interruption to your routine.

Note: Only compatible with factory-installed charging port. This item is not compatible with the regulated versions.