Solved! Thank you. I knew that I wanted the UID in the object's class, I just wasn't sure what to do in the event sheet to get it. I tried:
Event On mouse - On turret Clicked
Action on turret - ???
There was no option to get the ID of the turret when you are in the action menu for the turret, one needs to just select whatever variable you want and set it's value to Turret.UID, that didn't really make intuitive sense because just turret feels like it refers to the class as a whole and not the selected instance.