I have one of the old frames and it was not the easy open frame. It had a conversion done by TC and I think it cost approx 40-50 dollars for them to fix it where it will accept any Contender Barrel. I'm sure someone on here will know more since I'm just getting into this myself. I have since traded for two more new frames. There might be someone around besides TC that does the conversions but TC guarantees everything they make and work on.
Mike