PolarStar Airsoft F2™ HPA Engine Complete O-Ring Set

This is a full O-ring replacement set for the centreline version of the PolarStar Airsoft F2™ HPA Engine Conversion Kit. If you want to make sure all the seals are up to par, this is a great way to refresh them on the cheap. It's also a great bit of kit to keep in your toolbox just in case of an emergency, or you accidentally lose an o-ring during installation or maintenance.