Well..depends on how bad it is. That could definitely be a problem. How bad is the damage? You can try a different oring or some dow55 (using a buna oring) to keep it sealed. Goo thing is its not a dynamic oring..so if you get to to stayed sealed, you are good and it should continue to work. take some pictures of the damage.
F/S Unique Ion with all the upgrades an ion needs. Also have a barrel kit and rf chips up for sale