Niall,
I'm not sure if it could replace the turret on your 222 but I can't see why it wouldn't be able too. I can take measurements and send them your way for you to be able to do an initial verification. Where do you live, if it's close We could always try to meet up in order for you to try it out. The gun might be an easier fix. I could send you one of the spares I have and also the original that came with the 9 for you to see if they will work better wih yours. Let me know. Talk to you soon!
Alfonso
719-209-4500